Eject out of react-scripts

config/env.js

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+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+const paths = require('./paths');
+
+// Make sure that including paths.js after env.js will read .env variables.
+delete require.cache[require.resolve('./paths')];
+
+const NODE_ENV = process.env.NODE_ENV;
+if (!NODE_ENV) {
+  throw new Error(
+    'The NODE_ENV environment variable is required but was not specified.'
+  );
+}
+
+// https://github.com/bkeepers/dotenv#what-other-env-files-can-i-use
+var dotenvFiles = [
+  `${paths.dotenv}.${NODE_ENV}.local`,
+  `${paths.dotenv}.${NODE_ENV}`,
+  // Don't include `.env.local` for `test` environment
+  // since normally you expect tests to produce the same
+  // results for everyone
+  NODE_ENV !== 'test' && `${paths.dotenv}.local`,
+  paths.dotenv,
+].filter(Boolean);
+
+// Load environment variables from .env* files. Suppress warnings using silent
+// if this file is missing. dotenv will never modify any environment variables
+// that have already been set.  Variable expansion is supported in .env files.
+// https://github.com/motdotla/dotenv
+// https://github.com/motdotla/dotenv-expand
+dotenvFiles.forEach(dotenvFile => {
+  if (fs.existsSync(dotenvFile)) {
+    require('dotenv-expand')(
+      require('dotenv').config({
+        path: dotenvFile,
+      })
+    );
+  }
+});
+
+// We support resolving modules according to `NODE_PATH`.
+// This lets you use absolute paths in imports inside large monorepos:
+// https://github.com/facebook/create-react-app/issues/253.
+// It works similar to `NODE_PATH` in Node itself:
+// https://nodejs.org/api/modules.html#modules_loading_from_the_global_folders
+// Note that unlike in Node, only *relative* paths from `NODE_PATH` are honored.
+// Otherwise, we risk importing Node.js core modules into an app instead of Webpack shims.
+// https://github.com/facebook/create-react-app/issues/1023#issuecomment-265344421
+// We also resolve them to make sure all tools using them work consistently.
+const appDirectory = fs.realpathSync(process.cwd());
+process.env.NODE_PATH = (process.env.NODE_PATH || '')
+  .split(path.delimiter)
+  .filter(folder => folder && !path.isAbsolute(folder))
+  .map(folder => path.resolve(appDirectory, folder))
+  .join(path.delimiter);
+
+// Grab NODE_ENV and REACT_APP_* environment variables and prepare them to be
+// injected into the application via DefinePlugin in Webpack configuration.
+const REACT_APP = /^REACT_APP_/i;
+
+function getClientEnvironment(publicUrl) {
+  const raw = Object.keys(process.env)
+    .filter(key => REACT_APP.test(key))
+    .reduce(
+      (env, key) => {
+        env[key] = process.env[key];
+        return env;
+      },
+      {
+        // Useful for determining whether we’re running in production mode.
+        // Most importantly, it switches React into the correct mode.
+        NODE_ENV: process.env.NODE_ENV || 'development',
+        // Useful for resolving the correct path to static assets in `public`.
+        // For example, <img src={process.env.PUBLIC_URL + '/img/logo.png'} />.
+        // This should only be used as an escape hatch. Normally you would put
+        // images into the `src` and `import` them in code to get their paths.
+        PUBLIC_URL: publicUrl,
+      }
+    );
+  // Stringify all values so we can feed into Webpack DefinePlugin
+  const stringified = {
+    'process.env': Object.keys(raw).reduce((env, key) => {
+      env[key] = JSON.stringify(raw[key]);
+      return env;
+    }, {}),
+  };
+
+  return { raw, stringified };
+}
+
+module.exports = getClientEnvironment;

config/jest/cssTransform.js

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+'use strict';
+
+// This is a custom Jest transformer turning style imports into empty objects.
+// http://facebook.github.io/jest/docs/en/webpack.html
+
+module.exports = {
+  process() {
+    return 'module.exports = {};';
+  },
+  getCacheKey() {
+    // The output is always the same.
+    return 'cssTransform';
+  },
+};

config/jest/fileTransform.js

@@ -0,0 +1,30 @@
+'use strict';
+
+const path = require('path');
+
+// This is a custom Jest transformer turning file imports into filenames.
+// http://facebook.github.io/jest/docs/en/webpack.html
+
+module.exports = {
+  process(src, filename) {
+    const assetFilename = JSON.stringify(path.basename(filename));
+
+    if (filename.match(/\.svg$/)) {
+      return `module.exports = {
+        __esModule: true,
+        default: ${assetFilename},
+        ReactComponent: (props) => ({
+          $$typeof: Symbol.for('react.element'),
+          type: 'svg',
+          ref: null,
+          key: null,
+          props: Object.assign({}, props, {
+            children: ${assetFilename}
+          })
+        }),
+      };`;
+    }
+
+    return `module.exports = ${assetFilename};`;
+  },
+};

config/paths.js

@@ -0,0 +1,89 @@
+'use strict';
+
+const path = require('path');
+const fs = require('fs');
+const url = require('url');
+
+// Make sure any symlinks in the project folder are resolved:
+// https://github.com/facebook/create-react-app/issues/637
+const appDirectory = fs.realpathSync(process.cwd());
+const resolveApp = relativePath => path.resolve(appDirectory, relativePath);
+
+const envPublicUrl = process.env.PUBLIC_URL;
+
+function ensureSlash(inputPath, needsSlash) {
+  const hasSlash = inputPath.endsWith('/');
+  if (hasSlash && !needsSlash) {
+    return inputPath.substr(0, inputPath.length - 1);
+  } else if (!hasSlash && needsSlash) {
+    return `${inputPath}/`;
+  } else {
+    return inputPath;
+  }
+}
+
+const getPublicUrl = appPackageJson =>
+  envPublicUrl || require(appPackageJson).homepage;
+
+// We use `PUBLIC_URL` environment variable or "homepage" field to infer
+// "public path" at which the app is served.
+// Webpack needs to know it to put the right <script> hrefs into HTML even in
+// single-page apps that may serve index.html for nested URLs like /todos/42.
+// We can't use a relative path in HTML because we don't want to load something
+// like /todos/42/static/js/bundle.7289d.js. We have to know the root.
+function getServedPath(appPackageJson) {
+  const publicUrl = getPublicUrl(appPackageJson);
+  const servedUrl =
+    envPublicUrl || (publicUrl ? url.parse(publicUrl).pathname : '/');
+  return ensureSlash(servedUrl, true);
+}
+
+const moduleFileExtensions = [
+  'web.mjs',
+  'mjs',
+  'web.js',
+  'js',
+  'web.ts',
+  'ts',
+  'web.tsx',
+  'tsx',
+  'json',
+  'web.jsx',
+  'jsx',
+];
+
+// Resolve file paths in the same order as webpack
+const resolveModule = (resolveFn, filePath) => {
+  const extension = moduleFileExtensions.find(extension =>
+    fs.existsSync(resolveFn(`${filePath}.${extension}`))
+  );
+
+  if (extension) {
+    return resolveFn(`${filePath}.${extension}`);
+  }
+
+  return resolveFn(`${filePath}.js`);
+};
+
+// config after eject: we're in ./config/
+module.exports = {
+  dotenv: resolveApp('.env'),
+  appPath: resolveApp('.'),
+  appBuild: resolveApp('build'),
+  appPublic: resolveApp('public'),
+  appHtml: resolveApp('public/index.html'),
+  appIndexJs: resolveModule(resolveApp, 'src/index'),
+  appPackageJson: resolveApp('package.json'),
+  appSrc: resolveApp('src'),
+  appTsConfig: resolveApp('tsconfig.json'),
+  yarnLockFile: resolveApp('yarn.lock'),
+  testsSetup: resolveModule(resolveApp, 'src/setupTests'),
+  proxySetup: resolveApp('src/setupProxy.js'),
+  appNodeModules: resolveApp('node_modules'),
+  publicUrl: getPublicUrl(resolveApp('package.json')),
+  servedPath: getServedPath(resolveApp('package.json')),
+};
+
+
+
+module.exports.moduleFileExtensions = moduleFileExtensions;

config/webpack.config.dev.js

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+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+const resolve = require('resolve');
+const webpack = require('webpack');
+const PnpWebpackPlugin = require('pnp-webpack-plugin');
+const HtmlWebpackPlugin = require('html-webpack-plugin');
+const CaseSensitivePathsPlugin = require('case-sensitive-paths-webpack-plugin');
+const InterpolateHtmlPlugin = require('react-dev-utils/InterpolateHtmlPlugin');
+const WatchMissingNodeModulesPlugin = require('react-dev-utils/WatchMissingNodeModulesPlugin');
+const ModuleScopePlugin = require('react-dev-utils/ModuleScopePlugin');
+const getCSSModuleLocalIdent = require('react-dev-utils/getCSSModuleLocalIdent');
+const getClientEnvironment = require('./env');
+const paths = require('./paths');
+const ManifestPlugin = require('webpack-manifest-plugin');
+const ModuleNotFoundPlugin = require('react-dev-utils/ModuleNotFoundPlugin');
+const ForkTsCheckerWebpackPlugin = require('fork-ts-checker-webpack-plugin-alt');
+const typescriptFormatter = require('react-dev-utils/typescriptFormatter');
+
+
+// Webpack uses `publicPath` to determine where the app is being served from.
+// In development, we always serve from the root. This makes config easier.
+const publicPath = '/';
+// `publicUrl` is just like `publicPath`, but we will provide it to our app
+// as %PUBLIC_URL% in `index.html` and `process.env.PUBLIC_URL` in JavaScript.
+// Omit trailing slash as %PUBLIC_PATH%/xyz looks better than %PUBLIC_PATH%xyz.
+const publicUrl = '';
+// Get environment variables to inject into our app.
+const env = getClientEnvironment(publicUrl);
+
+// Check if TypeScript is setup
+const useTypeScript = fs.existsSync(paths.appTsConfig);
+
+// style files regexes
+const cssRegex = /\.css$/;
+const cssModuleRegex = /\.module\.css$/;
+const sassRegex = /\.(scss|sass)$/;
+const sassModuleRegex = /\.module\.(scss|sass)$/;
+
+// common function to get style loaders
+const getStyleLoaders = (cssOptions, preProcessor) => {
+  const loaders = [
+    require.resolve('style-loader'),
+    {
+      loader: require.resolve('css-loader'),
+      options: cssOptions,
+    },
+    {
+      // Options for PostCSS as we reference these options twice
+      // Adds vendor prefixing based on your specified browser support in
+      // package.json
+      loader: require.resolve('postcss-loader'),
+      options: {
+        // Necessary for external CSS imports to work
+        // https://github.com/facebook/create-react-app/issues/2677
+        ident: 'postcss',
+        plugins: () => [
+          require('postcss-flexbugs-fixes'),
+          require('postcss-preset-env')({
+            autoprefixer: {
+              flexbox: 'no-2009',
+            },
+            stage: 3,
+          }),
+        ],
+      },
+    },
+  ];
+  if (preProcessor) {
+    loaders.push(require.resolve(preProcessor));
+  }
+  return loaders;
+};
+
+// This is the development configuration.
+// It is focused on developer experience and fast rebuilds.
+// The production configuration is different and lives in a separate file.
+module.exports = {
+  mode: 'development',
+  // You may want 'eval' instead if you prefer to see the compiled output in DevTools.
+  // See the discussion in https://github.com/facebook/create-react-app/issues/343
+  devtool: 'cheap-module-source-map',
+  // These are the "entry points" to our application.
+  // This means they will be the "root" imports that are included in JS bundle.
+  entry: [
+    // Include an alternative client for WebpackDevServer. A client's job is to
+    // connect to WebpackDevServer by a socket and get notified about changes.
+    // When you save a file, the client will either apply hot updates (in case
+    // of CSS changes), or refresh the page (in case of JS changes). When you
+    // make a syntax error, this client will display a syntax error overlay.
+    // Note: instead of the default WebpackDevServer client, we use a custom one
+    // to bring better experience for Create React App users. You can replace
+    // the line below with these two lines if you prefer the stock client:
+    // require.resolve('webpack-dev-server/client') + '?/',
+    // require.resolve('webpack/hot/dev-server'),
+    require.resolve('react-dev-utils/webpackHotDevClient'),
+    // Finally, this is your app's code:
+    paths.appIndexJs,
+    // We include the app code last so that if there is a runtime error during
+    // initialization, it doesn't blow up the WebpackDevServer client, and
+    // changing JS code would still trigger a refresh.
+  ],
+  output: {
+    // Add /* filename */ comments to generated require()s in the output.
+    pathinfo: true,
+    // This does not produce a real file. It's just the virtual path that is
+    // served by WebpackDevServer in development. This is the JS bundle
+    // containing code from all our entry points, and the Webpack runtime.
+    filename: 'static/js/bundle.js',
+    // There are also additional JS chunk files if you use code splitting.
+    chunkFilename: 'static/js/[name].chunk.js',
+    // This is the URL that app is served from. We use "/" in development.
+    publicPath: publicPath,
+    // Point sourcemap entries to original disk location (format as URL on Windows)
+    devtoolModuleFilenameTemplate: info =>
+      path.resolve(info.absoluteResourcePath).replace(/\\/g, '/'),
+  },
+  optimization: {
+    // Automatically split vendor and commons
+    // https://twitter.com/wSokra/status/969633336732905474
+    // https://medium.com/webpack/webpack-4-code-splitting-chunk-graph-and-the-splitchunks-optimization-be739a861366
+    splitChunks: {
+      chunks: 'all',
+      name: false,
+    },
+    // Keep the runtime chunk seperated to enable long term caching
+    // https://twitter.com/wSokra/status/969679223278505985
+    runtimeChunk: true,
+  },
+  resolve: {
+    // This allows you to set a fallback for where Webpack should look for modules.
+    // We placed these paths second because we want `node_modules` to "win"
+    // if there are any conflicts. This matches Node resolution mechanism.
+    // https://github.com/facebook/create-react-app/issues/253
+    modules: ['node_modules'].concat(
+      // It is guaranteed to exist because we tweak it in `env.js`
+      process.env.NODE_PATH.split(path.delimiter).filter(Boolean)
+    ),
+    // These are the reasonable defaults supported by the Node ecosystem.
+    // We also include JSX as a common component filename extension to support
+    // some tools, although we do not recommend using it, see:
+    // https://github.com/facebook/create-react-app/issues/290
+    // `web` extension prefixes have been added for better support
+    // for React Native Web.
+    extensions: paths.moduleFileExtensions
+      .map(ext => `.${ext}`)
+      .filter(ext => useTypeScript || !ext.includes('ts')),
+    alias: {
+      // Support React Native Web
+      // https://www.smashingmagazine.com/2016/08/a-glimpse-into-the-future-with-react-native-for-web/
+      'react-native': 'react-native-web',
+    },
+    plugins: [
+      // Adds support for installing with Plug'n'Play, leading to faster installs and adding
+      // guards against forgotten dependencies and such.
+      PnpWebpackPlugin,
+      // Prevents users from importing files from outside of src/ (or node_modules/).
+      // This often causes confusion because we only process files within src/ with babel.
+      // To fix this, we prevent you from importing files out of src/ -- if you'd like to,
+      // please link the files into your node_modules/ and let module-resolution kick in.
+      // Make sure your source files are compiled, as they will not be processed in any way.
+      new ModuleScopePlugin(paths.appSrc, [paths.appPackageJson]),
+    ],
+  },
+  resolveLoader: {
+    plugins: [
+      // Also related to Plug'n'Play, but this time it tells Webpack to load its loaders
+      // from the current package.
+      PnpWebpackPlugin.moduleLoader(module),
+    ],
+  },
+  module: {
+    strictExportPresence: true,
+    rules: [
+      // Disable require.ensure as it's not a standard language feature.
+      { parser: { requireEnsure: false } },
+
+      // First, run the linter.
+      // It's important to do this before Babel processes the JS.
+      {
+        test: /\.(js|mjs|jsx)$/,
+        enforce: 'pre',
+        use: [
+          {
+            options: {
+              formatter: require.resolve('react-dev-utils/eslintFormatter'),
+              eslintPath: require.resolve('eslint'),
+              
+            },
+            loader: require.resolve('eslint-loader'),
+          },
+        ],
+        include: paths.appSrc,
+      },
+      {
+        // "oneOf" will traverse all following loaders until one will
+        // match the requirements. When no loader matches it will fall
+        // back to the "file" loader at the end of the loader list.
+        oneOf: [
+          // "url" loader works like "file" loader except that it embeds assets
+          // smaller than specified limit in bytes as data URLs to avoid requests.
+          // A missing `test` is equivalent to a match.
+          {
+            test: [/\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/],
+            loader: require.resolve('url-loader'),
+            options: {
+              limit: 10000,
+              name: 'static/media/[name].[hash:8].[ext]',
+            },
+          },
+          // Process application JS with Babel.
+          // The preset includes JSX, Flow, and some ESnext features.
+          {
+            test: /\.(js|mjs|jsx|ts|tsx)$/,
+            include: paths.appSrc,
+            loader: require.resolve('babel-loader'),
+            options: {
+              customize: require.resolve(
+                'babel-preset-react-app/webpack-overrides'
+              ),
+              
+              plugins: [
+                [
+                  require.resolve('babel-plugin-named-asset-import'),
+                  {
+                    loaderMap: {
+                      svg: {
+                        ReactComponent: '@svgr/webpack?-prettier,-svgo![path]',
+                      },
+                    },
+                  },
+                ],
+              ],
+              // This is a feature of `babel-loader` for webpack (not Babel itself).
+              // It enables caching results in ./node_modules/.cache/babel-loader/
+              // directory for faster rebuilds.
+              cacheDirectory: true,
+              // Don't waste time on Gzipping the cache
+              cacheCompression: false,
+            },
+          },
+          // Process any JS outside of the app with Babel.
+          // Unlike the application JS, we only compile the standard ES features.
+          {
+            test: /\.(js|mjs)$/,
+            exclude: /@babel(?:\/|\\{1,2})runtime/,
+            loader: require.resolve('babel-loader'),
+            options: {
+              babelrc: false,
+              configFile: false,
+              compact: false,
+              presets: [
+                [
+                  require.resolve('babel-preset-react-app/dependencies'),
+                  { helpers: true },
+                ],
+              ],
+              cacheDirectory: true,
+              // Don't waste time on Gzipping the cache
+              cacheCompression: false,
+              
+              // If an error happens in a package, it's possible to be
+              // because it was compiled. Thus, we don't want the browser
+              // debugger to show the original code. Instead, the code
+              // being evaluated would be much more helpful.
+              sourceMaps: false,
+            },
+          },
+          // "postcss" loader applies autoprefixer to our CSS.
+          // "css" loader resolves paths in CSS and adds assets as dependencies.
+          // "style" loader turns CSS into JS modules that inject <style> tags.
+          // In production, we use a plugin to extract that CSS to a file, but
+          // in development "style" loader enables hot editing of CSS.
+          // By default we support CSS Modules with the extension .module.css
+          {
+            test: cssRegex,
+            exclude: cssModuleRegex,
+            use: getStyleLoaders({
+              importLoaders: 1,
+            }),
+          },
+          // Adds support for CSS Modules (https://github.com/css-modules/css-modules)
+          // using the extension .module.css
+          {
+            test: cssModuleRegex,
+            use: getStyleLoaders({
+              importLoaders: 1,
+              modules: true,
+              getLocalIdent: getCSSModuleLocalIdent,
+            }),
+          },
+          // Opt-in support for SASS (using .scss or .sass extensions).
+          // Chains the sass-loader with the css-loader and the style-loader
+          // to immediately apply all styles to the DOM.
+          // By default we support SASS Modules with the
+          // extensions .module.scss or .module.sass
+          {
+            test: sassRegex,
+            exclude: sassModuleRegex,
+            use: getStyleLoaders({ importLoaders: 2 }, 'sass-loader'),
+          },
+          // Adds support for CSS Modules, but using SASS
+          // using the extension .module.scss or .module.sass
+          {
+            test: sassModuleRegex,
+            use: getStyleLoaders(
+              {
+                importLoaders: 2,
+                modules: true,
+                getLocalIdent: getCSSModuleLocalIdent,
+              },
+              'sass-loader'
+            ),
+          },
+          // "file" loader makes sure those assets get served by WebpackDevServer.
+          // When you `import` an asset, you get its (virtual) filename.
+          // In production, they would get copied to the `build` folder.
+          // This loader doesn't use a "test" so it will catch all modules
+          // that fall through the other loaders.
+          {
+            // Exclude `js` files to keep "css" loader working as it injects
+            // its runtime that would otherwise be processed through "file" loader.
+            // Also exclude `html` and `json` extensions so they get processed
+            // by webpacks internal loaders.
+            exclude: [/\.(js|mjs|jsx|ts|tsx)$/, /\.html$/, /\.json$/],
+            loader: require.resolve('file-loader'),
+            options: {
+              name: 'static/media/[name].[hash:8].[ext]',
+            },
+          },
+        ],
+      },
+      // ** STOP ** Are you adding a new loader?
+      // Make sure to add the new loader(s) before the "file" loader.
+    ],
+  },
+  plugins: [
+    // Generates an `index.html` file with the <script> injected.
+    new HtmlWebpackPlugin({
+      inject: true,
+      template: paths.appHtml,
+    }),
+    // Makes some environment variables available in index.html.
+    // The public URL is available as %PUBLIC_URL% in index.html, e.g.:
+    // <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
+    // In development, this will be an empty string.
+    new InterpolateHtmlPlugin(HtmlWebpackPlugin, env.raw),
+    // This gives some necessary context to module not found errors, such as
+    // the requesting resource.
+    new ModuleNotFoundPlugin(paths.appPath),
+    // Makes some environment variables available to the JS code, for example:
+    // if (process.env.NODE_ENV === 'development') { ... }. See `./env.js`.
+    new webpack.DefinePlugin(env.stringified),
+    // This is necessary to emit hot updates (currently CSS only):
+    new webpack.HotModuleReplacementPlugin(),
+    // Watcher doesn't work well if you mistype casing in a path so we use
+    // a plugin that prints an error when you attempt to do this.
+    // See https://github.com/facebook/create-react-app/issues/240
+    new CaseSensitivePathsPlugin(),
+    // If you require a missing module and then `npm install` it, you still have
+    // to restart the development server for Webpack to discover it. This plugin
+    // makes the discovery automatic so you don't have to restart.
+    // See https://github.com/facebook/create-react-app/issues/186
+    new WatchMissingNodeModulesPlugin(paths.appNodeModules),
+    // Moment.js is an extremely popular library that bundles large locale files
+    // by default due to how Webpack interprets its code. This is a practical
+    // solution that requires the user to opt into importing specific locales.
+    // https://github.com/jmblog/how-to-optimize-momentjs-with-webpack
+    // You can remove this if you don't use Moment.js:
+    new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),
+    // Generate a manifest file which contains a mapping of all asset filenames
+    // to their corresponding output file so that tools can pick it up without
+    // having to parse `index.html`.
+    new ManifestPlugin({
+      fileName: 'asset-manifest.json',
+      publicPath: publicPath,
+    }),
+    // TypeScript type checking
+    useTypeScript &&
+      new ForkTsCheckerWebpackPlugin({
+        typescript: resolve.sync('typescript', {
+          basedir: paths.appNodeModules,
+        }),
+        async: false,
+        checkSyntacticErrors: true,
+        tsconfig: paths.appTsConfig,
+        compilerOptions: {
+          module: 'esnext',
+          moduleResolution: 'node',
+          resolveJsonModule: true,
+          isolatedModules: true,
+          noEmit: true,
+          jsx: 'preserve',
+        },
+        reportFiles: [
+          '**',
+          '!**/*.json',
+          '!**/__tests__/**',
+          '!**/?(*.)(spec|test).*',
+          '!src/setupProxy.js',
+          '!src/setupTests.*',
+        ],
+        watch: paths.appSrc,
+        silent: true,
+        formatter: typescriptFormatter,
+      }),
+  ].filter(Boolean),
+
+  // Some libraries import Node modules but don't use them in the browser.
+  // Tell Webpack to provide empty mocks for them so importing them works.
+  node: {
+    dgram: 'empty',
+    fs: 'empty',
+    net: 'empty',
+    tls: 'empty',
+    child_process: 'empty',
+  },
+  // Turn off performance processing because we utilize
+  // our own hints via the FileSizeReporter
+  performance: false,
+};

config/webpack.config.prod.js

@@ -0,0 +1,539 @@
+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+const webpack = require('webpack');
+const resolve = require('resolve');
+const PnpWebpackPlugin = require('pnp-webpack-plugin');
+const HtmlWebpackPlugin = require('html-webpack-plugin');
+const InlineChunkHtmlPlugin = require('react-dev-utils/InlineChunkHtmlPlugin');
+const TerserPlugin = require('terser-webpack-plugin');
+const MiniCssExtractPlugin = require('mini-css-extract-plugin');
+const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');
+const safePostCssParser = require('postcss-safe-parser');
+const ManifestPlugin = require('webpack-manifest-plugin');
+const InterpolateHtmlPlugin = require('react-dev-utils/InterpolateHtmlPlugin');
+const WorkboxWebpackPlugin = require('workbox-webpack-plugin');
+const ModuleScopePlugin = require('react-dev-utils/ModuleScopePlugin');
+const getCSSModuleLocalIdent = require('react-dev-utils/getCSSModuleLocalIdent');
+const paths = require('./paths');
+const getClientEnvironment = require('./env');
+const ModuleNotFoundPlugin = require('react-dev-utils/ModuleNotFoundPlugin');
+const ForkTsCheckerWebpackPlugin = require('fork-ts-checker-webpack-plugin-alt');
+const typescriptFormatter = require('react-dev-utils/typescriptFormatter');
+
+
+// Webpack uses `publicPath` to determine where the app is being served from.
+// It requires a trailing slash, or the file assets will get an incorrect path.
+const publicPath = paths.servedPath;
+// Some apps do not use client-side routing with pushState.
+// For these, "homepage" can be set to "." to enable relative asset paths.
+const shouldUseRelativeAssetPaths = publicPath === './';
+// Source maps are resource heavy and can cause out of memory issue for large source files.
+const shouldUseSourceMap = process.env.GENERATE_SOURCEMAP !== 'false';
+// Some apps do not need the benefits of saving a web request, so not inlining the chunk
+// makes for a smoother build process.
+const shouldInlineRuntimeChunk = process.env.INLINE_RUNTIME_CHUNK !== 'false';
+// `publicUrl` is just like `publicPath`, but we will provide it to our app
+// as %PUBLIC_URL% in `index.html` and `process.env.PUBLIC_URL` in JavaScript.
+// Omit trailing slash as %PUBLIC_URL%/xyz looks better than %PUBLIC_URL%xyz.
+const publicUrl = publicPath.slice(0, -1);
+// Get environment variables to inject into our app.
+const env = getClientEnvironment(publicUrl);
+
+// Assert this just to be safe.
+// Development builds of React are slow and not intended for production.
+if (env.stringified['process.env'].NODE_ENV !== '"production"') {
+  throw new Error('Production builds must have NODE_ENV=production.');
+}
+
+// Check if TypeScript is setup
+const useTypeScript = fs.existsSync(paths.appTsConfig);
+
+// style files regexes
+const cssRegex = /\.css$/;
+const cssModuleRegex = /\.module\.css$/;
+const sassRegex = /\.(scss|sass)$/;
+const sassModuleRegex = /\.module\.(scss|sass)$/;
+
+// common function to get style loaders
+const getStyleLoaders = (cssOptions, preProcessor) => {
+  const loaders = [
+    {
+      loader: MiniCssExtractPlugin.loader,
+      options: Object.assign(
+        {},
+        shouldUseRelativeAssetPaths ? { publicPath: '../../' } : undefined
+      ),
+    },
+    {
+      loader: require.resolve('css-loader'),
+      options: cssOptions,
+    },
+    {
+      // Options for PostCSS as we reference these options twice
+      // Adds vendor prefixing based on your specified browser support in
+      // package.json
+      loader: require.resolve('postcss-loader'),
+      options: {
+        // Necessary for external CSS imports to work
+        // https://github.com/facebook/create-react-app/issues/2677
+        ident: 'postcss',
+        plugins: () => [
+          require('postcss-flexbugs-fixes'),
+          require('postcss-preset-env')({
+            autoprefixer: {
+              flexbox: 'no-2009',
+            },
+            stage: 3,
+          }),
+        ],
+        sourceMap: shouldUseSourceMap,
+      },
+    },
+  ];
+  if (preProcessor) {
+    loaders.push({
+      loader: require.resolve(preProcessor),
+      options: {
+        sourceMap: shouldUseSourceMap,
+      },
+    });
+  }
+  return loaders;
+};
+
+// This is the production configuration.
+// It compiles slowly and is focused on producing a fast and minimal bundle.
+// The development configuration is different and lives in a separate file.
+module.exports = {
+  mode: 'production',
+  // Don't attempt to continue if there are any errors.
+  bail: true,
+  // We generate sourcemaps in production. This is slow but gives good results.
+  // You can exclude the *.map files from the build during deployment.
+  devtool: shouldUseSourceMap ? 'source-map' : false,
+  // In production, we only want to load the app code.
+  entry: [paths.appIndexJs],
+  output: {
+    // The build folder.
+    path: paths.appBuild,
+    // Generated JS file names (with nested folders).
+    // There will be one main bundle, and one file per asynchronous chunk.
+    // We don't currently advertise code splitting but Webpack supports it.
+    filename: 'static/js/[name].[chunkhash:8].js',
+    chunkFilename: 'static/js/[name].[chunkhash:8].chunk.js',
+    // We inferred the "public path" (such as / or /my-project) from homepage.
+    publicPath: publicPath,
+    // Point sourcemap entries to original disk location (format as URL on Windows)
+    devtoolModuleFilenameTemplate: info =>
+      path
+        .relative(paths.appSrc, info.absoluteResourcePath)
+        .replace(/\\/g, '/'),
+  },
+  optimization: {
+    minimizer: [
+      new TerserPlugin({
+        terserOptions: {
+          parse: {
+            // we want terser to parse ecma 8 code. However, we don't want it
+            // to apply any minfication steps that turns valid ecma 5 code
+            // into invalid ecma 5 code. This is why the 'compress' and 'output'
+            // sections only apply transformations that are ecma 5 safe
+            // https://github.com/facebook/create-react-app/pull/4234
+            ecma: 8,
+          },
+          compress: {
+            ecma: 5,
+            warnings: false,
+            // Disabled because of an issue with Uglify breaking seemingly valid code:
+            // https://github.com/facebook/create-react-app/issues/2376
+            // Pending further investigation:
+            // https://github.com/mishoo/UglifyJS2/issues/2011
+            comparisons: false,
+            // Disabled because of an issue with Terser breaking valid code:
+            // https://github.com/facebook/create-react-app/issues/5250
+            // Pending futher investigation:
+            // https://github.com/terser-js/terser/issues/120
+            inline: 2,
+          },
+          mangle: {
+            safari10: true,
+          },
+          output: {
+            ecma: 5,
+            comments: false,
+            // Turned on because emoji and regex is not minified properly using default
+            // https://github.com/facebook/create-react-app/issues/2488
+            ascii_only: true,
+          },
+        },
+        // Use multi-process parallel running to improve the build speed
+        // Default number of concurrent runs: os.cpus().length - 1
+        parallel: true,
+        // Enable file caching
+        cache: true,
+        sourceMap: shouldUseSourceMap,
+      }),
+      new OptimizeCSSAssetsPlugin({
+        cssProcessorOptions: {
+          parser: safePostCssParser,
+          map: shouldUseSourceMap
+            ? {
+                // `inline: false` forces the sourcemap to be output into a
+                // separate file
+                inline: false,
+                // `annotation: true` appends the sourceMappingURL to the end of
+                // the css file, helping the browser find the sourcemap
+                annotation: true,
+              }
+            : false,
+        },
+      }),
+    ],
+    // Automatically split vendor and commons
+    // https://twitter.com/wSokra/status/969633336732905474
+    // https://medium.com/webpack/webpack-4-code-splitting-chunk-graph-and-the-splitchunks-optimization-be739a861366
+    splitChunks: {
+      chunks: 'all',
+      name: false,
+    },
+    // Keep the runtime chunk seperated to enable long term caching
+    // https://twitter.com/wSokra/status/969679223278505985
+    runtimeChunk: true,
+  },
+  resolve: {
+    // This allows you to set a fallback for where Webpack should look for modules.
+    // We placed these paths second because we want `node_modules` to "win"
+    // if there are any conflicts. This matches Node resolution mechanism.
+    // https://github.com/facebook/create-react-app/issues/253
+    modules: ['node_modules'].concat(
+      // It is guaranteed to exist because we tweak it in `env.js`
+      process.env.NODE_PATH.split(path.delimiter).filter(Boolean)
+    ),
+    // These are the reasonable defaults supported by the Node ecosystem.
+    // We also include JSX as a common component filename extension to support
+    // some tools, although we do not recommend using it, see:
+    // https://github.com/facebook/create-react-app/issues/290
+    // `web` extension prefixes have been added for better support
+    // for React Native Web.
+    extensions: paths.moduleFileExtensions
+      .map(ext => `.${ext}`)
+      .filter(ext => useTypeScript || !ext.includes('ts')),
+    alias: {
+      // Support React Native Web
+      // https://www.smashingmagazine.com/2016/08/a-glimpse-into-the-future-with-react-native-for-web/
+      'react-native': 'react-native-web',
+    },
+    plugins: [
+      // Adds support for installing with Plug'n'Play, leading to faster installs and adding
+      // guards against forgotten dependencies and such.
+      PnpWebpackPlugin,
+      // Prevents users from importing files from outside of src/ (or node_modules/).
+      // This often causes confusion because we only process files within src/ with babel.
+      // To fix this, we prevent you from importing files out of src/ -- if you'd like to,
+      // please link the files into your node_modules/ and let module-resolution kick in.
+      // Make sure your source files are compiled, as they will not be processed in any way.
+      new ModuleScopePlugin(paths.appSrc, [paths.appPackageJson]),
+    ],
+  },
+  resolveLoader: {
+    plugins: [
+      // Also related to Plug'n'Play, but this time it tells Webpack to load its loaders
+      // from the current package.
+      PnpWebpackPlugin.moduleLoader(module),
+    ],
+  },
+  module: {
+    strictExportPresence: true,
+    rules: [
+      // Disable require.ensure as it's not a standard language feature.
+      { parser: { requireEnsure: false } },
+
+      // First, run the linter.
+      // It's important to do this before Babel processes the JS.
+      {
+        test: /\.(js|mjs|jsx)$/,
+        enforce: 'pre',
+        use: [
+          {
+            options: {
+              formatter: require.resolve('react-dev-utils/eslintFormatter'),
+              eslintPath: require.resolve('eslint'),
+              
+            },
+            loader: require.resolve('eslint-loader'),
+          },
+        ],
+        include: paths.appSrc,
+      },
+      {
+        // "oneOf" will traverse all following loaders until one will
+        // match the requirements. When no loader matches it will fall
+        // back to the "file" loader at the end of the loader list.
+        oneOf: [
+          // "url" loader works just like "file" loader but it also embeds
+          // assets smaller than specified size as data URLs to avoid requests.
+          {
+            test: [/\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/],
+            loader: require.resolve('url-loader'),
+            options: {
+              limit: 10000,
+              name: 'static/media/[name].[hash:8].[ext]',
+            },
+          },
+          // Process application JS with Babel.
+          // The preset includes JSX, Flow, TypeScript and some ESnext features.
+          {
+            test: /\.(js|mjs|jsx|ts|tsx)$/,
+            include: paths.appSrc,
+
+            loader: require.resolve('babel-loader'),
+            options: {
+              customize: require.resolve(
+                'babel-preset-react-app/webpack-overrides'
+              ),
+              
+              plugins: [
+                [
+                  require.resolve('babel-plugin-named-asset-import'),
+                  {
+                    loaderMap: {
+                      svg: {
+                        ReactComponent: '@svgr/webpack?-prettier,-svgo![path]',
+                      },
+                    },
+                  },
+                ],
+              ],
+              cacheDirectory: true,
+              // Save disk space when time isn't as important
+              cacheCompression: true,
+              compact: true,
+            },
+          },
+          // Process any JS outside of the app with Babel.
+          // Unlike the application JS, we only compile the standard ES features.
+          {
+            test: /\.(js|mjs)$/,
+            exclude: /@babel(?:\/|\\{1,2})runtime/,
+            loader: require.resolve('babel-loader'),
+            options: {
+              babelrc: false,
+              configFile: false,
+              compact: false,
+              presets: [
+                [
+                  require.resolve('babel-preset-react-app/dependencies'),
+                  { helpers: true },
+                ],
+              ],
+              cacheDirectory: true,
+              // Save disk space when time isn't as important
+              cacheCompression: true,
+              
+              // If an error happens in a package, it's possible to be
+              // because it was compiled. Thus, we don't want the browser
+              // debugger to show the original code. Instead, the code
+              // being evaluated would be much more helpful.
+              sourceMaps: false,
+            },
+          },
+          // "postcss" loader applies autoprefixer to our CSS.
+          // "css" loader resolves paths in CSS and adds assets as dependencies.
+          // `MiniCSSExtractPlugin` extracts styles into CSS
+          // files. If you use code splitting, async bundles will have their own separate CSS chunk file.
+          // By default we support CSS Modules with the extension .module.css
+          {
+            test: cssRegex,
+            exclude: cssModuleRegex,
+            loader: getStyleLoaders({
+              importLoaders: 1,
+              sourceMap: shouldUseSourceMap,
+            }),
+            // Don't consider CSS imports dead code even if the
+            // containing package claims to have no side effects.
+            // Remove this when webpack adds a warning or an error for this.
+            // See https://github.com/webpack/webpack/issues/6571
+            sideEffects: true,
+          },
+          // Adds support for CSS Modules (https://github.com/css-modules/css-modules)
+          // using the extension .module.css
+          {
+            test: cssModuleRegex,
+            loader: getStyleLoaders({
+              importLoaders: 1,
+              sourceMap: shouldUseSourceMap,
+              modules: true,
+              getLocalIdent: getCSSModuleLocalIdent,
+            }),
+          },
+          // Opt-in support for SASS. The logic here is somewhat similar
+          // as in the CSS routine, except that "sass-loader" runs first
+          // to compile SASS files into CSS.
+          // By default we support SASS Modules with the
+          // extensions .module.scss or .module.sass
+          {
+            test: sassRegex,
+            exclude: sassModuleRegex,
+            loader: getStyleLoaders(
+              {
+                importLoaders: 2,
+                sourceMap: shouldUseSourceMap,
+              },
+              'sass-loader'
+            ),
+            // Don't consider CSS imports dead code even if the
+            // containing package claims to have no side effects.
+            // Remove this when webpack adds a warning or an error for this.
+            // See https://github.com/webpack/webpack/issues/6571
+            sideEffects: true,
+          },
+          // Adds support for CSS Modules, but using SASS
+          // using the extension .module.scss or .module.sass
+          {
+            test: sassModuleRegex,
+            loader: getStyleLoaders(
+              {
+                importLoaders: 2,
+                sourceMap: shouldUseSourceMap,
+                modules: true,
+                getLocalIdent: getCSSModuleLocalIdent,
+              },
+              'sass-loader'
+            ),
+          },
+          // "file" loader makes sure assets end up in the `build` folder.
+          // When you `import` an asset, you get its filename.
+          // This loader doesn't use a "test" so it will catch all modules
+          // that fall through the other loaders.
+          {
+            loader: require.resolve('file-loader'),
+            // Exclude `js` files to keep "css" loader working as it injects
+            // it's runtime that would otherwise be processed through "file" loader.
+            // Also exclude `html` and `json` extensions so they get processed
+            // by webpacks internal loaders.
+            exclude: [/\.(js|mjs|jsx|ts|tsx)$/, /\.html$/, /\.json$/],
+            options: {
+              name: 'static/media/[name].[hash:8].[ext]',
+            },
+          },
+          // ** STOP ** Are you adding a new loader?
+          // Make sure to add the new loader(s) before the "file" loader.
+        ],
+      },
+    ],
+  },
+  plugins: [
+    // Generates an `index.html` file with the <script> injected.
+    new HtmlWebpackPlugin({
+      inject: true,
+      template: paths.appHtml,
+      minify: {
+        removeComments: true,
+        collapseWhitespace: true,
+        removeRedundantAttributes: true,
+        useShortDoctype: true,
+        removeEmptyAttributes: true,
+        removeStyleLinkTypeAttributes: true,
+        keepClosingSlash: true,
+        minifyJS: true,
+        minifyCSS: true,
+        minifyURLs: true,
+      },
+    }),
+    // Inlines the webpack runtime script. This script is too small to warrant
+    // a network request.
+    shouldInlineRuntimeChunk &&
+      new InlineChunkHtmlPlugin(HtmlWebpackPlugin, [/runtime~.+[.]js/]),
+    // Makes some environment variables available in index.html.
+    // The public URL is available as %PUBLIC_URL% in index.html, e.g.:
+    // <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
+    // In production, it will be an empty string unless you specify "homepage"
+    // in `package.json`, in which case it will be the pathname of that URL.
+    new InterpolateHtmlPlugin(HtmlWebpackPlugin, env.raw),
+    // This gives some necessary context to module not found errors, such as
+    // the requesting resource.
+    new ModuleNotFoundPlugin(paths.appPath),
+    // Makes some environment variables available to the JS code, for example:
+    // if (process.env.NODE_ENV === 'production') { ... }. See `./env.js`.
+    // It is absolutely essential that NODE_ENV was set to production here.
+    // Otherwise React will be compiled in the very slow development mode.
+    new webpack.DefinePlugin(env.stringified),
+    new MiniCssExtractPlugin({
+      // Options similar to the same options in webpackOptions.output
+      // both options are optional
+      filename: 'static/css/[name].[contenthash:8].css',
+      chunkFilename: 'static/css/[name].[contenthash:8].chunk.css',
+    }),
+    // Generate a manifest file which contains a mapping of all asset filenames
+    // to their corresponding output file so that tools can pick it up without
+    // having to parse `index.html`.
+    new ManifestPlugin({
+      fileName: 'asset-manifest.json',
+      publicPath: publicPath,
+    }),
+    // Moment.js is an extremely popular library that bundles large locale files
+    // by default due to how Webpack interprets its code. This is a practical
+    // solution that requires the user to opt into importing specific locales.
+    // https://github.com/jmblog/how-to-optimize-momentjs-with-webpack
+    // You can remove this if you don't use Moment.js:
+    new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),
+    // Generate a service worker script that will precache, and keep up to date,
+    // the HTML & assets that are part of the Webpack build.
+    new WorkboxWebpackPlugin.GenerateSW({
+      clientsClaim: true,
+      exclude: [/\.map$/, /asset-manifest\.json$/],
+      importWorkboxFrom: 'cdn',
+      navigateFallback: publicUrl + '/index.html',
+      navigateFallbackBlacklist: [
+        // Exclude URLs starting with /_, as they're likely an API call
+        new RegExp('^/_'),
+        // Exclude URLs containing a dot, as they're likely a resource in
+        // public/ and not a SPA route
+        new RegExp('/[^/]+\\.[^/]+$'),
+      ],
+    }),
+    // TypeScript type checking
+    fs.existsSync(paths.appTsConfig) &&
+      new ForkTsCheckerWebpackPlugin({
+        typescript: resolve.sync('typescript', {
+          basedir: paths.appNodeModules,
+        }),
+        async: false,
+        checkSyntacticErrors: true,
+        tsconfig: paths.appTsConfig,
+        compilerOptions: {
+          module: 'esnext',
+          moduleResolution: 'node',
+          resolveJsonModule: true,
+          isolatedModules: true,
+          noEmit: true,
+          jsx: 'preserve',
+        },
+        reportFiles: [
+          '**',
+          '!**/*.json',
+          '!**/__tests__/**',
+          '!**/?(*.)(spec|test).*',
+          '!src/setupProxy.js',
+          '!src/setupTests.*',
+        ],
+        watch: paths.appSrc,
+        silent: true,
+        formatter: typescriptFormatter,
+      }),
+  ].filter(Boolean),
+  // Some libraries import Node modules but don't use them in the browser.
+  // Tell Webpack to provide empty mocks for them so importing them works.
+  node: {
+    dgram: 'empty',
+    fs: 'empty',
+    net: 'empty',
+    tls: 'empty',
+    child_process: 'empty',
+  },
+  // Turn off performance processing because we utilize
+  // our own hints via the FileSizeReporter
+  performance: false,
+};

config/webpackDevServer.config.js

@@ -0,0 +1,105 @@
+'use strict';
+
+const errorOverlayMiddleware = require('react-dev-utils/errorOverlayMiddleware');
+const evalSourceMapMiddleware = require('react-dev-utils/evalSourceMapMiddleware');
+const noopServiceWorkerMiddleware = require('react-dev-utils/noopServiceWorkerMiddleware');
+const ignoredFiles = require('react-dev-utils/ignoredFiles');
+const config = require('./webpack.config.dev');
+const paths = require('./paths');
+const fs = require('fs');
+
+const protocol = process.env.HTTPS === 'true' ? 'https' : 'http';
+const host = process.env.HOST || '0.0.0.0';
+
+module.exports = function(proxy, allowedHost) {
+  return {
+    // WebpackDevServer 2.4.3 introduced a security fix that prevents remote
+    // websites from potentially accessing local content through DNS rebinding:
+    // https://github.com/webpack/webpack-dev-server/issues/887
+    // https://medium.com/webpack/webpack-dev-server-middleware-security-issues-1489d950874a
+    // However, it made several existing use cases such as development in cloud
+    // environment or subdomains in development significantly more complicated:
+    // https://github.com/facebook/create-react-app/issues/2271
+    // https://github.com/facebook/create-react-app/issues/2233
+    // While we're investigating better solutions, for now we will take a
+    // compromise. Since our WDS configuration only serves files in the `public`
+    // folder we won't consider accessing them a vulnerability. However, if you
+    // use the `proxy` feature, it gets more dangerous because it can expose
+    // remote code execution vulnerabilities in backends like Django and Rails.
+    // So we will disable the host check normally, but enable it if you have
+    // specified the `proxy` setting. Finally, we let you override it if you
+    // really know what you're doing with a special environment variable.
+    disableHostCheck:
+      !proxy || process.env.DANGEROUSLY_DISABLE_HOST_CHECK === 'true',
+    // Enable gzip compression of generated files.
+    compress: true,
+    // Silence WebpackDevServer's own logs since they're generally not useful.
+    // It will still show compile warnings and errors with this setting.
+    clientLogLevel: 'none',
+    // By default WebpackDevServer serves physical files from current directory
+    // in addition to all the virtual build products that it serves from memory.
+    // This is confusing because those files won’t automatically be available in
+    // production build folder unless we copy them. However, copying the whole
+    // project directory is dangerous because we may expose sensitive files.
+    // Instead, we establish a convention that only files in `public` directory
+    // get served. Our build script will copy `public` into the `build` folder.
+    // In `index.html`, you can get URL of `public` folder with %PUBLIC_URL%:
+    // <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
+    // In JavaScript code, you can access it with `process.env.PUBLIC_URL`.
+    // Note that we only recommend to use `public` folder as an escape hatch
+    // for files like `favicon.ico`, `manifest.json`, and libraries that are
+    // for some reason broken when imported through Webpack. If you just want to
+    // use an image, put it in `src` and `import` it from JavaScript instead.
+    contentBase: paths.appPublic,
+    // By default files from `contentBase` will not trigger a page reload.
+    watchContentBase: true,
+    // Enable hot reloading server. It will provide /sockjs-node/ endpoint
+    // for the WebpackDevServer client so it can learn when the files were
+    // updated. The WebpackDevServer client is included as an entry point
+    // in the Webpack development configuration. Note that only changes
+    // to CSS are currently hot reloaded. JS changes will refresh the browser.
+    hot: true,
+    // It is important to tell WebpackDevServer to use the same "root" path
+    // as we specified in the config. In development, we always serve from /.
+    publicPath: config.output.publicPath,
+    // WebpackDevServer is noisy by default so we emit custom message instead
+    // by listening to the compiler events with `compiler.hooks[...].tap` calls above.
+    quiet: true,
+    // Reportedly, this avoids CPU overload on some systems.
+    // https://github.com/facebook/create-react-app/issues/293
+    // src/node_modules is not ignored to support absolute imports
+    // https://github.com/facebook/create-react-app/issues/1065
+    watchOptions: {
+      ignored: ignoredFiles(paths.appSrc),
+    },
+    // Enable HTTPS if the HTTPS environment variable is set to 'true'
+    https: protocol === 'https',
+    host,
+    overlay: false,
+    historyApiFallback: {
+      // Paths with dots should still use the history fallback.
+      // See https://github.com/facebook/create-react-app/issues/387.
+      disableDotRule: true,
+    },
+    public: allowedHost,
+    proxy,
+    before(app, server) {
+      if (fs.existsSync(paths.proxySetup)) {
+        // This registers user provided middleware for proxy reasons
+        require(paths.proxySetup)(app);
+      }
+
+      // This lets us fetch source contents from webpack for the error overlay
+      app.use(evalSourceMapMiddleware(server));
+      // This lets us open files from the runtime error overlay.
+      app.use(errorOverlayMiddleware());
+
+      // This service worker file is effectively a 'no-op' that will reset any
+      // previous service worker registered for the same host:port combination.
+      // We do this in development to avoid hitting the production cache if
+      // it used the same host and port.
+      // https://github.com/facebook/create-react-app/issues/2272#issuecomment-302832432
+      app.use(noopServiceWorkerMiddleware());
+    },
+  };
+};

package.json

@@ -3,18 +3,63 @@
   "version": "0.1.0",
   "private": true,
   "dependencies": {
+    "@babel/core": "7.1.0",
+    "@svgr/webpack": "2.4.1",
+    "babel-core": "7.0.0-bridge.0",
+    "babel-eslint": "9.0.0",
+    "babel-jest": "23.6.0",
+    "babel-loader": "8.0.4",
+    "babel-plugin-named-asset-import": "^0.2.3",
+    "babel-preset-react-app": "^6.1.0",
+    "bfj": "6.1.1",
+    "case-sensitive-paths-webpack-plugin": "2.1.2",
+    "chalk": "2.4.1",
+    "css-loader": "1.0.0",
+    "dotenv": "6.0.0",
+    "dotenv-expand": "4.2.0",
+    "eslint": "5.6.0",
+    "eslint-config-react-app": "^3.0.5",
+    "eslint-loader": "2.1.1",
+    "eslint-plugin-flowtype": "2.50.1",
+    "eslint-plugin-import": "2.14.0",
+    "eslint-plugin-jsx-a11y": "6.1.2",
+    "eslint-plugin-react": "7.11.1",
+    "file-loader": "2.0.0",
+    "fork-ts-checker-webpack-plugin-alt": "0.4.14",
+    "fs-extra": "7.0.0",
+    "html-webpack-plugin": "4.0.0-alpha.2",
+    "identity-obj-proxy": "3.0.0",
+    "jest": "23.6.0",
+    "jest-pnp-resolver": "1.0.1",
+    "jest-resolve": "23.6.0",
+    "mini-css-extract-plugin": "0.4.3",
+    "optimize-css-assets-webpack-plugin": "5.0.1",
+    "pnp-webpack-plugin": "1.1.0",
+    "postcss-flexbugs-fixes": "4.1.0",
+    "postcss-loader": "3.0.0",
+    "postcss-preset-env": "6.0.6",
+    "postcss-safe-parser": "4.0.1",
     "react": "^16.6.3",
+    "react-app-polyfill": "^0.1.3",
+    "react-dev-utils": "^6.1.1",
     "react-dom": "^16.6.3",
     "react-redux": "^5.1.1",
-    "react-scripts": "2.1.1",
     "redux": "^4.0.1",
-    "redux-thunk": "^2.3.0"
+    "redux-thunk": "^2.3.0",
+    "resolve": "1.8.1",
+    "sass-loader": "7.1.0",
+    "style-loader": "0.23.0",
+    "terser-webpack-plugin": "1.1.0",
+    "url-loader": "1.1.1",
+    "webpack": "4.19.1",
+    "webpack-dev-server": "3.1.9",
+    "webpack-manifest-plugin": "2.0.4",
+    "workbox-webpack-plugin": "3.6.3"
   },
   "scripts": {
-    "start": "react-scripts start",
+    "start": "node scripts/start.js",
-    "build": "react-scripts build",
+    "build": "node scripts/build.js",
-    "test": "react-scripts test",
+    "test": "node scripts/test.js"
-    "eject": "react-scripts eject"
   },
   "eslintConfig": {
     "extends": "react-app"
@@ -24,5 +69,51 @@
     "not dead",
     "not ie <= 11",
     "not op_mini all"
+  ],
+  "jest": {
+    "collectCoverageFrom": [
+      "src/**/*.{js,jsx,ts,tsx}",
+      "!src/**/*.d.ts"
+    ],
+    "resolver": "jest-pnp-resolver",
+    "setupFiles": [
+      "react-app-polyfill/jsdom"
+    ],
+    "testMatch": [
+      "<rootDir>/src/**/__tests__/**/*.{js,jsx,ts,tsx}",
+      "<rootDir>/src/**/?(*.)(spec|test).{js,jsx,ts,tsx}"
+    ],
+    "testEnvironment": "jsdom",
+    "testURL": "http://localhost",
+    "transform": {
+      "^.+\\.(js|jsx|ts|tsx)$": "<rootDir>/node_modules/babel-jest",
+      "^.+\\.css$": "<rootDir>/config/jest/cssTransform.js",
+      "^(?!.*\\.(js|jsx|ts|tsx|css|json)$)": "<rootDir>/config/jest/fileTransform.js"
+    },
+    "transformIgnorePatterns": [
+      "[/\\\\]node_modules[/\\\\].+\\.(js|jsx|ts|tsx)$",
+      "^.+\\.module\\.(css|sass|scss)$"
+    ],
+    "moduleNameMapper": {
+      "^react-native$": "react-native-web",
+      "^.+\\.module\\.(css|sass|scss)$": "identity-obj-proxy"
+    },
+    "moduleFileExtensions": [
+      "web.js",
+      "js",
+      "web.ts",
+      "ts",
+      "web.tsx",
+      "tsx",
+      "json",
+      "web.jsx",
+      "jsx",
+      "node"
     ]
+  },
+  "babel": {
+    "presets": [
+      "react-app"
+    ]
+  }
 }

scripts/build.js

@@ -0,0 +1,189 @@
+'use strict';
+
+// Do this as the first thing so that any code reading it knows the right env.
+process.env.BABEL_ENV = 'production';
+process.env.NODE_ENV = 'production';
+
+// Makes the script crash on unhandled rejections instead of silently
+// ignoring them. In the future, promise rejections that are not handled will
+// terminate the Node.js process with a non-zero exit code.
+process.on('unhandledRejection', err => {
+  throw err;
+});
+
+// Ensure environment variables are read.
+require('../config/env');
+
+
+const path = require('path');
+const chalk = require('chalk');
+const fs = require('fs-extra');
+const webpack = require('webpack');
+const bfj = require('bfj');
+const config = require('../config/webpack.config.prod');
+const paths = require('../config/paths');
+const checkRequiredFiles = require('react-dev-utils/checkRequiredFiles');
+const formatWebpackMessages = require('react-dev-utils/formatWebpackMessages');
+const printHostingInstructions = require('react-dev-utils/printHostingInstructions');
+const FileSizeReporter = require('react-dev-utils/FileSizeReporter');
+const printBuildError = require('react-dev-utils/printBuildError');
+
+const measureFileSizesBeforeBuild =
+  FileSizeReporter.measureFileSizesBeforeBuild;
+const printFileSizesAfterBuild = FileSizeReporter.printFileSizesAfterBuild;
+const useYarn = fs.existsSync(paths.yarnLockFile);
+
+// These sizes are pretty large. We'll warn for bundles exceeding them.
+const WARN_AFTER_BUNDLE_GZIP_SIZE = 512 * 1024;
+const WARN_AFTER_CHUNK_GZIP_SIZE = 1024 * 1024;
+
+const isInteractive = process.stdout.isTTY;
+
+// Warn and crash if required files are missing
+if (!checkRequiredFiles([paths.appHtml, paths.appIndexJs])) {
+  process.exit(1);
+}
+
+// Process CLI arguments
+const argv = process.argv.slice(2);
+const writeStatsJson = argv.indexOf('--stats') !== -1;
+
+// We require that you explicitly set browsers and do not fall back to
+// browserslist defaults.
+const { checkBrowsers } = require('react-dev-utils/browsersHelper');
+checkBrowsers(paths.appPath, isInteractive)
+  .then(() => {
+    // First, read the current file sizes in build directory.
+    // This lets us display how much they changed later.
+    return measureFileSizesBeforeBuild(paths.appBuild);
+  })
+  .then(previousFileSizes => {
+    // Remove all content but keep the directory so that
+    // if you're in it, you don't end up in Trash
+    fs.emptyDirSync(paths.appBuild);
+    // Merge with the public folder
+    copyPublicFolder();
+    // Start the webpack build
+    return build(previousFileSizes);
+  })
+  .then(
+    ({ stats, previousFileSizes, warnings }) => {
+      if (warnings.length) {
+        console.log(chalk.yellow('Compiled with warnings.\n'));
+        console.log(warnings.join('\n\n'));
+        console.log(
+          '\nSearch for the ' +
+            chalk.underline(chalk.yellow('keywords')) +
+            ' to learn more about each warning.'
+        );
+        console.log(
+          'To ignore, add ' +
+            chalk.cyan('// eslint-disable-next-line') +
+            ' to the line before.\n'
+        );
+      } else {
+        console.log(chalk.green('Compiled successfully.\n'));
+      }
+
+      console.log('File sizes after gzip:\n');
+      printFileSizesAfterBuild(
+        stats,
+        previousFileSizes,
+        paths.appBuild,
+        WARN_AFTER_BUNDLE_GZIP_SIZE,
+        WARN_AFTER_CHUNK_GZIP_SIZE
+      );
+      console.log();
+
+      const appPackage = require(paths.appPackageJson);
+      const publicUrl = paths.publicUrl;
+      const publicPath = config.output.publicPath;
+      const buildFolder = path.relative(process.cwd(), paths.appBuild);
+      printHostingInstructions(
+        appPackage,
+        publicUrl,
+        publicPath,
+        buildFolder,
+        useYarn
+      );
+    },
+    err => {
+      console.log(chalk.red('Failed to compile.\n'));
+      printBuildError(err);
+      process.exit(1);
+    }
+  )
+  .catch(err => {
+    if (err && err.message) {
+      console.log(err.message);
+    }
+    process.exit(1);
+  });
+
+// Create the production build and print the deployment instructions.
+function build(previousFileSizes) {
+  console.log('Creating an optimized production build...');
+
+  let compiler = webpack(config);
+  return new Promise((resolve, reject) => {
+    compiler.run((err, stats) => {
+      let messages;
+      if (err) {
+        if (!err.message) {
+          return reject(err);
+        }
+        messages = formatWebpackMessages({
+          errors: [err.message],
+          warnings: [],
+        });
+      } else {
+        messages = formatWebpackMessages(
+          stats.toJson({ all: false, warnings: true, errors: true })
+        );
+      }
+      if (messages.errors.length) {
+        // Only keep the first error. Others are often indicative
+        // of the same problem, but confuse the reader with noise.
+        if (messages.errors.length > 1) {
+          messages.errors.length = 1;
+        }
+        return reject(new Error(messages.errors.join('\n\n')));
+      }
+      if (
+        process.env.CI &&
+        (typeof process.env.CI !== 'string' ||
+          process.env.CI.toLowerCase() !== 'false') &&
+        messages.warnings.length
+      ) {
+        console.log(
+          chalk.yellow(
+            '\nTreating warnings as errors because process.env.CI = true.\n' +
+              'Most CI servers set it automatically.\n'
+          )
+        );
+        return reject(new Error(messages.warnings.join('\n\n')));
+      }
+
+      const resolveArgs = {
+        stats,
+        previousFileSizes,
+        warnings: messages.warnings,
+      };
+      if (writeStatsJson) {
+        return bfj
+          .write(paths.appBuild + '/bundle-stats.json', stats.toJson())
+          .then(() => resolve(resolveArgs))
+          .catch(error => reject(new Error(error)));
+      }
+
+      return resolve(resolveArgs);
+    });
+  });
+}
+
+function copyPublicFolder() {
+  fs.copySync(paths.appPublic, paths.appBuild, {
+    dereference: true,
+    filter: file => file !== paths.appHtml,
+  });
+}

scripts/start.js

@@ -0,0 +1,116 @@
+'use strict';
+
+// Do this as the first thing so that any code reading it knows the right env.
+process.env.BABEL_ENV = 'development';
+process.env.NODE_ENV = 'development';
+
+// Makes the script crash on unhandled rejections instead of silently
+// ignoring them. In the future, promise rejections that are not handled will
+// terminate the Node.js process with a non-zero exit code.
+process.on('unhandledRejection', err => {
+  throw err;
+});
+
+// Ensure environment variables are read.
+require('../config/env');
+
+
+const fs = require('fs');
+const chalk = require('chalk');
+const webpack = require('webpack');
+const WebpackDevServer = require('webpack-dev-server');
+const clearConsole = require('react-dev-utils/clearConsole');
+const checkRequiredFiles = require('react-dev-utils/checkRequiredFiles');
+const {
+  choosePort,
+  createCompiler,
+  prepareProxy,
+  prepareUrls,
+} = require('react-dev-utils/WebpackDevServerUtils');
+const openBrowser = require('react-dev-utils/openBrowser');
+const paths = require('../config/paths');
+const config = require('../config/webpack.config.dev');
+const createDevServerConfig = require('../config/webpackDevServer.config');
+
+const useYarn = fs.existsSync(paths.yarnLockFile);
+const isInteractive = process.stdout.isTTY;
+
+// Warn and crash if required files are missing
+if (!checkRequiredFiles([paths.appHtml, paths.appIndexJs])) {
+  process.exit(1);
+}
+
+// Tools like Cloud9 rely on this.
+const DEFAULT_PORT = parseInt(process.env.PORT, 10) || 3000;
+const HOST = process.env.HOST || '0.0.0.0';
+
+if (process.env.HOST) {
+  console.log(
+    chalk.cyan(
+      `Attempting to bind to HOST environment variable: ${chalk.yellow(
+        chalk.bold(process.env.HOST)
+      )}`
+    )
+  );
+  console.log(
+    `If this was unintentional, check that you haven't mistakenly set it in your shell.`
+  );
+  console.log(
+    `Learn more here: ${chalk.yellow('http://bit.ly/CRA-advanced-config')}`
+  );
+  console.log();
+}
+
+// We require that you explictly set browsers and do not fall back to
+// browserslist defaults.
+const { checkBrowsers } = require('react-dev-utils/browsersHelper');
+checkBrowsers(paths.appPath, isInteractive)
+  .then(() => {
+    // We attempt to use the default port but if it is busy, we offer the user to
+    // run on a different port. `choosePort()` Promise resolves to the next free port.
+    return choosePort(HOST, DEFAULT_PORT);
+  })
+  .then(port => {
+    if (port == null) {
+      // We have not found a port.
+      return;
+    }
+    const protocol = process.env.HTTPS === 'true' ? 'https' : 'http';
+    const appName = require(paths.appPackageJson).name;
+    const urls = prepareUrls(protocol, HOST, port);
+    // Create a webpack compiler that is configured with custom messages.
+    const compiler = createCompiler(webpack, config, appName, urls, useYarn);
+    // Load proxy config
+    const proxySetting = require(paths.appPackageJson).proxy;
+    const proxyConfig = prepareProxy(proxySetting, paths.appPublic);
+    // Serve webpack assets generated by the compiler over a web server.
+    const serverConfig = createDevServerConfig(
+      proxyConfig,
+      urls.lanUrlForConfig
+    );
+    const devServer = new WebpackDevServer(compiler, serverConfig);
+    // Launch WebpackDevServer.
+    devServer.listen(port, HOST, err => {
+      if (err) {
+        return console.log(err);
+      }
+      if (isInteractive) {
+        clearConsole();
+      }
+      console.log(chalk.cyan('Starting the development server...\n'));
+      openBrowser(urls.localUrlForBrowser);
+    });
+
+    ['SIGINT', 'SIGTERM'].forEach(function(sig) {
+      process.on(sig, function() {
+        devServer.close();
+        process.exit();
+      });
+    });
+  })
+  .catch(err => {
+    if (err && err.message) {
+      console.log(err.message);
+    }
+    process.exit(1);
+  });

scripts/test.js

@@ -0,0 +1,53 @@
+'use strict';
+
+// Do this as the first thing so that any code reading it knows the right env.
+process.env.BABEL_ENV = 'test';
+process.env.NODE_ENV = 'test';
+process.env.PUBLIC_URL = '';
+
+// Makes the script crash on unhandled rejections instead of silently
+// ignoring them. In the future, promise rejections that are not handled will
+// terminate the Node.js process with a non-zero exit code.
+process.on('unhandledRejection', err => {
+  throw err;
+});
+
+// Ensure environment variables are read.
+require('../config/env');
+
+
+const jest = require('jest');
+const execSync = require('child_process').execSync;
+let argv = process.argv.slice(2);
+
+function isInGitRepository() {
+  try {
+    execSync('git rev-parse --is-inside-work-tree', { stdio: 'ignore' });
+    return true;
+  } catch (e) {
+    return false;
+  }
+}
+
+function isInMercurialRepository() {
+  try {
+    execSync('hg --cwd . root', { stdio: 'ignore' });
+    return true;
+  } catch (e) {
+    return false;
+  }
+}
+
+// Watch unless on CI, in coverage mode, or explicitly running all tests
+if (
+  !process.env.CI &&
+  argv.indexOf('--coverage') === -1 &&
+  argv.indexOf('--watchAll') === -1
+) {
+  // https://github.com/facebook/create-react-app/issues/5210
+  const hasSourceControl = isInGitRepository() || isInMercurialRepository();
+  argv.push(hasSourceControl ? '--watch' : '--watchAll');
+}
+
+
+jest.run(argv);

yarn.lock

@@ -3424,7 +3424,7 @@ fs.realpath@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/fs.realpath/-/fs.realpath-1.0.0.tgz#1504ad2523158caa40db4a2787cb01411994ea4f"
 
-fsevents@1.2.4, fsevents@^1.2.2, fsevents@^1.2.3:
+fsevents@^1.2.2, fsevents@^1.2.3:
   version "1.2.4"
   resolved "https://registry.yarnpkg.com/fsevents/-/fsevents-1.2.4.tgz#f41dcb1af2582af3692da36fc55cbd8e1041c426"
   dependencies:
@@ -6774,60 +6774,6 @@ react-redux@^5.1.1:
     react-is "^16.6.0"
     react-lifecycles-compat "^3.0.0"
 
-react-scripts@2.1.1:
-  version "2.1.1"
-  resolved "https://registry.yarnpkg.com/react-scripts/-/react-scripts-2.1.1.tgz#c2959a756b0b61d3090adece0d7aedd324dff8a5"
-  dependencies:
-    "@babel/core" "7.1.0"
-    "@svgr/webpack" "2.4.1"
-    babel-core "7.0.0-bridge.0"
-    babel-eslint "9.0.0"
-    babel-jest "23.6.0"
-    babel-loader "8.0.4"
-    babel-plugin-named-asset-import "^0.2.3"
-    babel-preset-react-app "^6.1.0"
-    bfj "6.1.1"
-    case-sensitive-paths-webpack-plugin "2.1.2"
-    chalk "2.4.1"
-    css-loader "1.0.0"
-    dotenv "6.0.0"
-    dotenv-expand "4.2.0"
-    eslint "5.6.0"
-    eslint-config-react-app "^3.0.5"
-    eslint-loader "2.1.1"
-    eslint-plugin-flowtype "2.50.1"
-    eslint-plugin-import "2.14.0"
-    eslint-plugin-jsx-a11y "6.1.2"
-    eslint-plugin-react "7.11.1"
-    file-loader "2.0.0"
-    fork-ts-checker-webpack-plugin-alt "0.4.14"
-    fs-extra "7.0.0"
-    html-webpack-plugin "4.0.0-alpha.2"
-    identity-obj-proxy "3.0.0"
-    jest "23.6.0"
-    jest-pnp-resolver "1.0.1"
-    jest-resolve "23.6.0"
-    mini-css-extract-plugin "0.4.3"
-    optimize-css-assets-webpack-plugin "5.0.1"
-    pnp-webpack-plugin "1.1.0"
-    postcss-flexbugs-fixes "4.1.0"
-    postcss-loader "3.0.0"
-    postcss-preset-env "6.0.6"
-    postcss-safe-parser "4.0.1"
-    react-app-polyfill "^0.1.3"
-    react-dev-utils "^6.1.1"
-    resolve "1.8.1"
-    sass-loader "7.1.0"
-    style-loader "0.23.0"
-    terser-webpack-plugin "1.1.0"
-    url-loader "1.1.1"
-    webpack "4.19.1"
-    webpack-dev-server "3.1.9"
-    webpack-manifest-plugin "2.0.4"
-    workbox-webpack-plugin "3.6.3"
-  optionalDependencies:
-    fsevents "1.2.4"
-
 react@^16.6.3:
   version "16.6.3"
   resolved "https://registry.yarnpkg.com/react/-/react-16.6.3.tgz#25d77c91911d6bbdd23db41e70fb094cc1e0871c"