How to move a Python service from a Docker Image -DHI without breaking package installs, root permissions?

You change one line in your Dockerfile — swap FROM python:3.11-slim for FROM dhi.io/python:3.11-debian12 — kick off the build, and watch it fall over. apt-get: command not found. Fix that, rebuild, and now it's Permission denied writing to a log directory. Fix that too, and your container won't bind