soumadip801/mern-backend-gh-action ? reverse-engineered prompt

Build me the backend for a MERN app, with a simple REST API and basic server setup that I can connect to a frontend later.

I also want GitHub Actions set up so the project can automatically run checks and build when code is pushed. Keep it clean and easy to extend, and if you need current best practices for the CI setup or backend tooling, look up the latest docs online.

Please make sure the server starts properly, the structure is easy to understand, and the backend is ready for adding features like auth, CRUD routes, and database work later.