shaikrafi25/mern_project ? reverse-engineered prompt

Build me a simple learning management system called LearnHub.

I want a clean web app where students can sign up, log in, browse courses, and see course details, lessons, and progress. Teachers or admins should be able to add and manage courses, organize content, and track who is enrolled. Make it feel polished and easy to use, with a nice dashboard for both learners and admins.

Please set up the frontend and backend so the app actually works end to end, with a modern responsive interface and a basic API for users, courses, and enrollments. Use current best practices, and if you need to check the latest docs for anything, go ahead and look them up online.

Keep it practical and simple for a first version, but make sure the app is structured well enough that I can expand it later.