willplacetech/PDV-Mern ? reverse-engineered prompt

Build me a simple full stack app from this starter, with a React frontend and a backend in the existing backend folder.

I want it set up as a working MERN style project, with the basic pages, navigation, and a clean modern UI on the frontend, plus a backend that can handle the app data and talk to the frontend through an API. Make sure the app runs smoothly in development, the folders are organized, and the main features are actually wired together so it feels like a real product instead of just a template.

If anything important is unclear, make the most reasonable choice and keep it lightweight. Look up current docs online if you need to.