fix: Correct environment variables and MIME types for production

- Change VITE_SERVER_URL to SERVER_URL in docker-compose
- Add dist directory serving for built assets
- Configure Express to serve JS modules with correct MIME type
- Fix undefined Game Server in containers

client/server.js

@@ -9,8 +9,12 @@ dotenv.config({ path: `.env.${ENV}` });
 const app = express();
 const PORT = process.env.PORT || 3000;
 
-// Serve static files from current directory
+// Configure MIME types for modules
+express.static.mime.define({'application/javascript': ['js', 'mjs']});
+
+// Serve static files from current directory and dist
 app.use(express.static('.'));
+app.use(express.static('dist'));
 
 // Serve main HTML file
 app.get('/', (req, res) => {