[Python] How to debug a Flask app which runs with gunicorn in a container?

I have been looking for a way to start a python debugger so I can debug my flask app which is being executed with gunicorn inside a docker container and then connect to it with my VSCode from outside.

But I dont find any solutions. In fact someone here suggests that it is not possible at all?

Is there a way to debug my flask app executed by gunicorn?

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