wasimnlrl-glitch/MERNAcademy ? reverse-engineered prompt

Build me a full stack learning app for teaching the MERN stack, where people can browse a course, open modules and lessons, read practical explanations, and go through interactive quizzes and coding exercises with answers revealed after they try them.

I want it to feel like a real course platform, not just static pages. Include a home page, module pages, lesson pages, and case study pages, plus progress tracking so completed lessons are saved through the API. The backend should power the course content, quiz grading, and progress updates, and the app should work without needing a database setup by default, using an in memory store. If it helps, look up current docs online for anything you need.

Make the design clean and easy to follow, with code examples shown nicely and markdown content rendered well. Also include a final capstone style section for a full stack task manager project, since the course should build toward something real.