feat: Add Dockerfile and docker-compose for deployment

- Multi-stage Dockerfile for optimized image size
- docker-compose.yml for easy local deployment
- Enable standalone output mode for Docker support

next.config.ts

@@ -1,7 +1,7 @@
 import type { NextConfig } from "next";
 
 const nextConfig: NextConfig = {
-  /* config options here */
+  output: 'standalone',
 };
 
 export default nextConfig;