feat(container) production build

frontend/.dockerignore

@@ -1,7 +1,7 @@
 /node_modules
 
-/.next/
-/out/
+/.next
+/out
 /build
 
 .DS_Store

frontend/next.config.mjs

@@ -11,8 +11,8 @@ const nextConfig = {
                 hostname: 'pic.re'
             }
         ]
-    }
-    // output: 'standalone'
+    },
+    output: 'standalone'
 };
 
 export default nextConfig;