Adds docker dev / CI / production deployment pipeline

[frizzle-chan]

• Adds docker-compose based development
• Adds CI jobs to run the tests automatically in the same container that will go to production
• Use the same docker environment in CI and production
• Use pip-tools to lock the pip dependencies so versions don't drift around.
• If you enable dependabot then dependabot can keep both the python and the dockerfile deps up-to-date for you

Demo running on GCP cloud run: https://vroxy-5hctqgkzlq-uc.a.run.app/?u=https://www.youtube.com/watch?v=kvjQEyKkPaA

Running on cloud run is highly advantageous for folks because it will shut your container down when you aren't receiving requests and you aren't billed for the CPU time. They also handle all the tls certificate stuff for you. There are other platforms like render.com and heroku (kinda stagnant at this point) that can also run the container with basically no config needed.

---

I would merge #2 #3 #4 first