backend for this project?

Hi,

Looks like a cool project. I got it working with ng6, but now I notice its missing a backend. Don't suppose there is some code (even partial) you can share for the backend? Or at a minimum something that shows the data model the client is expecting for objects like lessons / courses, posts etc. I'd be glad to create a new branch for ng6 if that helps.

Thank you,

-S. Arora