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

.env

@@ -0,0 +1,41 @@
+# LogWhispererAI - Production Environment Configuration
+# Generated for deployment with reverse proxy
+# Date: 2026-04-03
+
+# ============================================
+# FRONTEND CONFIGURATION (VITE_* variables)
+# These are exposed to the browser
+# ============================================
+
+# Backend API URL - HTTPS endpoint via reverse proxy
+VITE_API_URL=https://srv-logwhispererai.lab.home.lucasacchi.net
+
+# Webhook base URL - public HTTPS endpoint for webhooks
+VITE_WEBHOOK_BASE_URL=https://logwhispererai.lab.home.lucasacchi.net/webhook
+
+# Install script URL - public HTTPS endpoint for install script
+VITE_INSTALL_SCRIPT_URL=https://logwhispererai.lab.home.lucasacchi.net/install.sh
+
+# Application identification
+VITE_APP_NAME=LogWhispererAI
+
+# Application public URL - main frontend domain
+VITE_APP_URL=https://logwhispererai.lab.home.lucasacchi.net
+
+# ============================================
+# BACKEND CONFIGURATION
+# ============================================
+
+# CORS Origins - restrict to frontend domain for security
+# Only requests from this origin will be accepted by the backend
+CORS_ORIGINS=https://logwhispererai.lab.home.lucasacchi.net
+
+# Webhook base URL - used for generating webhook URLs
+# This should match VITE_WEBHOOK_BASE_URL
+WEBHOOK_BASE_URL=https://logwhispererai.lab.home.lucasacchi.net/webhook
+
+# API delay simulation (milliseconds) - simulates AI processing time
+DELAY_MS=1500
+
+# Node environment
+NODE_ENV=production