Add vertical bar chart UI with Hono mock server

server.js

@@ -0,0 +1,27 @@
+import { serve } from '@hono/node-server';
+import { serveStatic } from '@hono/node-server/serve-static';
+import { Hono } from 'hono';
+
+const counters = {
+  'zone-a': 10,
+  'zone-b': 15,
+  'zone-c': 20,
+};
+
+const app = new Hono();
+
+app.get('/api/v1/zones/:zoneId/primary/temperature', (c) => {
+  const zoneId = c.req.param('zoneId');
+  if (!(zoneId in counters)) counters[zoneId] = 10;
+  const value = counters[zoneId];
+  counters[zoneId] += Math.floor(Math.random() * 3) + 3;
+  return c.json({ value });
+});
+
+app.use('/src/*', serveStatic({ root: '.' }));
+
+app.get('/', serveStatic({ path: './index.html', root: '.' }));
+
+serve({ fetch: app.fetch, port: 3001 }, (info) => {
+  console.log(`Server running on http://localhost:${info.port}`);
+});