Construct a basic API

The API is planned to be written in Python3 (so it integrates easily with the data scraper), with FastAPI.

This task will entail:

• Linking the root route, /, to serve the built files from the frontend.
• Adding a single GET endpoint so that data can be passed from the backend to the frontend. This endpoint will serve a list of courses, from an example file (which can be empty for now).