Update .gitignore and .dockerignore

[kruton]

Try to unify the git and docker ignore files a little bit. This also ignores more byte-compiled files and some caches of tools that can help with finding errors (mypy, ruff).

These are just things I ran into while working on the code base. This doesn't change the final outputs but speeds up development a little bit.

[dgtlmoon]

super cool, i'll have to check this manually

[dgtlmoon]

Thanks so much