satyamranatc/Mern_Hosting ? reverse-engineered prompt

Build me a simple MERN app with a frontend and backend, set up so I can run it locally and then host it easily.

I want a clean React frontend that talks to a Node and Express backend, with a basic example like a simple sign up or note taking app so I can see the full flow working. Make sure the frontend and backend are separated into their own folders, and that everything is wired together so the app starts without a lot of manual setup.

Please include the usual stuff I would need to deploy it later, like clear run commands, environment variable support, and anything needed to make it work smoothly on a hosting platform. If you need to check current docs online for deployment details, go ahead and do that. Keep it simple, polished, and ready to use.