Trigger user service CI build

- Update user service to trigger GitHub Actions
- Deploy health check fix to Kubernetes

Author: Jeffrey-Xu

monopoly/user-service/src/server.js

@@ -49,3 +49,4 @@ app.listen(PORT, () => {
 
 module.exports = app;
 // Updated Thu  4 Sep 2025 20:26:03 CST
+// Updated Thu  4 Sep 2025 22:28:34 CST