reMRKableDev/OnLearn ? reverse-engineered prompt

Build me a simple online learning management system for a proof of concept, not something production ready.

I want users to be able to sign up and log in with a normal email and password, or use Google sign in. Once logged in, they should be able to browse courses, open lessons, and see basic learning content. Include support for uploading images and videos through Cloudinary, and store the app data in MongoDB.

Make it feel like a real LMS with a clean dashboard, navigation, profile page, and a few starter pages for course lists and course details. Use the existing mockup style as a guide if needed, and keep the app easy to run locally with environment variables for the database, session secret, Google login, and Cloudinary settings.

If you need current setup details for any library or API, look them up online. Also add a few basic tests so I can tell the main flows are working.