Add basic logging

.env.example

@@ -39,3 +39,22 @@ ASK262_EMBEDDING_PROVIDER=ollama
 # Required when running behind a reverse proxy or in production
 # Example: https://ask262.bendtherules.in or https://your-server.com
 # MCP_PUBLIC_URL=http://localhost:8081
+
+# =============================================================================
+# LOGGING CONFIGURATION
+# =============================================================================
+
+# Log level: trace, debug, info, warn, error
+# HTTP server defaults to 'debug', stdio server defaults to 'info'
+# ASK262_LOG_LEVEL=info
+
+# Directory for log files (optional, defaults to ./logs)
+# ASK262_LOG_DIR=./logs
+
+# Max log file size in MB before rotation (optional, defaults to 100)
+# System logrotate handles rotation, this is for reference
+# ASK262_LOG_MAX_SIZE=100
+
+# Days to keep rotated logs before deletion (optional, defaults to 30)
+# Set to 0 to keep forever
+# ASK262_LOG_RETENTION_DAYS=30