How to make change to a file inside a python-slim container?

Question

I have a FROM python:3.8-slim-buster Dockerfile and I want to make a small change to the entrypoint.sh file. Unfortunately it seems there are no editors, neither vi or ed. Moreover, it is not possible to do apt-get update :(

What is the best way to have at least an editor?

Answer 1

At the very least apt-get should be available.

I ended up just doing apt-get install nano.