Dockerize the bot

[NickBurnett]

Since Compute Engine isn't the ideal solution here, I'm going to Dockerize the bot and deploy it to Google K8s so that we can transition to more of a CI/CD pipeline.

[NickBurnett]

There will be a Dockerfile for the GitHub action build and we'll use docker-compose for local development. That means that the bot's configuration will have to change slightly to use environment variables, which means that settings can no longer be loaded from JSON - they'll have to be grabbed at runtime for some fields.

[NickBurnett]

This will happen once I convince Willie to start using CI/CD.

[ez314]

After being too lazy to deploy my change for 5 days I see the merit of this