Bug Fixes
- Use Python 3 in Dockerfile (1105)
([1111](https://github.com/ocadotechnology/rapid-router/pull/1111),
[`533983f`](https://github.com/ocadotechnology/rapid-router/commit/533983ff99e288296defc8c2bc60d199533f11d1))
* Fix 1105 Use Python 3
f-string syntax is only valid in Python 3 Use a sha in case the image gets updated and breaks things
* chore: Remove old comment
Python is pulled from the base image now