feat: add production configuration with environment variables

- Add .env file for production deployment with reverse proxy
- Add docker-compose.prod.yml for production profile
- Add docker-compose.override.yml for local development
- Update docker-compose.yml with all configurable variables
- Update frontend to use VITE_* environment variables
- Update backend to support CORS_ORIGINS and WEBHOOK_BASE_URL
- Add vite.config.ts allowedHosts for reverse proxy
- Add documentation for docker-compose and reverse proxy setup

All URLs are now configurable via environment variables:
- VITE_API_URL: Backend API endpoint
- VITE_WEBHOOK_BASE_URL: Webhook base URL
- VITE_INSTALL_SCRIPT_URL: Install script URL
- VITE_APP_URL: Frontend URL
- CORS_ORIGINS: Allowed CORS origins
- WEBHOOK_BASE_URL: Backend webhook base URL

frontend/vite.config.ts

@@ -10,5 +10,13 @@ export default defineConfig({
     watch: {
       usePolling: true,
     },
+    // Allow requests from reverse proxy host
+    // Add your production domain here
+    allowedHosts: [
+      'localhost',
+      '127.0.0.1',
+      '.lab.home.lucasacchi.net',  // Allow all subdomains
+      'logwhispererai.lab.home.lucasacchi.net',
+    ],
   },
 })