Investigate time zone alternatives

[pushfoo]

TL;DR: See if we can go static because the time zone lib and Python in docker have issues

What's wrong?

1. timezonefinder is unmaintained
2. Docker has / had issues with Python install freezing

Ways to address it

• Try bumping setuptools and Python to see if install issues are still broken
• See if uvicorn and FastAPI still have issues
• Look into other, smaller APIs
• Quantize & freeze the bound geometry as "acceptable" for demos?