refactor: update Dockerfile and docker-compose.yml for Next.js 15 optimization and standalone output

next.config.js

@@ -23,6 +23,8 @@ const nextConfig = {
   trailingSlash: false,
   compress: true,
   poweredByHeader: false,
+  // Enable standalone output for Docker
+  output: 'standalone',
 };
 
 module.exports = nextConfig;