feat: dockerize python services

[vreynolds]

Which problem is this PR solving?

• updates Improve the ease of running the example services #95
• make running python services easier and consistent

Short description of the changes

• use dockerized python services in tilt
• consolidate running docs in the root readme
• switch py to python moniker when interacting with tilt

How to verify

tilt up python

[JamieDanielson]

This works 🎉 but takes about 5 minutes on my mac m2. I realize the base image wasn't changed here but since we're doing this, can we change in the same PR? alpine took 5 minutes compared to slim which took about 17s

suggest changing from this:

FROM python:3.10-alpine
WORKDIR /app
RUN apk add --no-cache gcc musl-dev python3-dev libffi-dev openssl-dev cargo

to this:

FROM python:3.10-slim
WORKDIR /app

(no need to install the other libraries with this image)