uday-CSE-debug/sample_mernapp ? reverse-engineered prompt

Build me a simple MERN stack app that shows the basics of a full app with a frontend, backend, and database connection.

I want a clean starter project where someone can open it, run it locally, and see a working app with a simple page, a backend API, and the ability to create and view a few items. Keep the UI simple and easy to understand, nothing fancy, just something that feels complete and usable.

Make sure the app is set up in a way that is easy to extend later, with clear separation between client and server code, sensible error handling, and basic instructions for how to run it. If you need to check current best practices or docs while building it, go ahead and look them up online.

Please make it feel like a real working starter rather than just a blank scaffold.