Switch from Alpine to python:3.7-slim-buster #1215
Description
https://pythonspeed.com/articles/base-image-python-docker-images/
Alpine is good for making a small image but bad for overall development flow because you need to rebuild Python wheels. docker-library/docs#904
This wastes a lot of time and CPU during the build process.
We should switch over to python:3.7-slim-buster as recommended or figure out some other way to make builds go faster.
Another point it appears alpine is also slower: https://github.com/tao12345666333/docker-python-perf