sakshi170501/Backend--using-Mern ? reverse-engineered prompt

Build me a simple backend project in JavaScript for a MERN style app, like a clean starter that I can use to follow along with a backend tutorial series.

I want the app set up so it runs easily, reads settings from an env file, and has a basic server structure that is easy to understand and extend. Please include a few sensible default routes so I can test that everything is working, plus a basic place for public files if needed. Keep it organized and beginner friendly, because I want this to be something I can build on as I learn backend development.

If anything is unclear from the project details, use current docs online and make reasonable choices. Also make sure the setup is simple to run locally, with clear startup scripts and a sample env file showing the important variables.