How to configure Django through environment variables?

Question

Django

A long time ago, I left Django for Flask, and then I decided to tinker with django.
Flask is imperative, it's somehow clearer how everything works - you control everything yourself.
Junga is declarative and somewhat more difficult to deal with the details.
The output requires a docker image of the django application, which is configured by environment variables.
In general, I had several configuration layers in the flask and I myself steered the configuration loading sequence: object, file, environment variables
How are such things implemented in jung? Or is settings.py the only option?