This application is extremely, absolutely, 100% not ready for public use. At all. It's done in an extremely crude manor because I want nothing more than to simply see how the Homebridge API works.
If for whatever reason you want to use it, be my guest. server.py runs locally.
You can install the plugin from npm for use on your Homebridge instance.
The moodlight itself runs on Python using the pygame library. You can install it with pip install pygame, though again, I don't recommend running it.
server.py runs and listens for requests with a configured password as a query string parameter. Bag way of doing it? Totally. It read & writes the contents of a file to pass information between the server and the moodlight because this isn't something that needs them communicating via some other means. Could I just run the HTTP server in the same script as pygame? Probably. Never touched pygame and I'm only using it because it's a quick way to show a block colour on the screen.