Switch to UWSGI and improve Docker definitions

Dockerfile

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+# syntax=docker/dockerfile:1
+FROM python:3
+ARG OPERATION
+
+RUN useradd -d /code xf
+RUN mkdir -p /code
+RUN chown -R xf:xf /code
+
+RUN mkdir -p /conf/static
+RUN chown -R xf:xf /conf
+
+RUN mkdir /venv
+RUN chown xf:xf /venv
+
+USER xf
+ENV PYTHONDONTWRITEBYTECODE=1
+ENV PYTHONUNBUFFERED=1
+WORKDIR /code
+COPY requirements.txt /code/
+RUN python -m venv /venv
+RUN . /venv/bin/activate && pip install -r requirements.txt
+
+# CMD . /venv/bin/activate && uwsgi --ini /conf/uwsgi.ini
+
+CMD if [ "$OPERATION" = "uwsgi" ] ; then . /venv/bin/activate && uwsgi --ini /conf/uwsgi.ini ; else . /venv/bin/activate && exec python manage.py runserver 0.0.0.0:8000; fi
+
+# CMD . /venv/bin/activate && uvicorn --reload --reload-include *.html --workers 2 --uds /var/run/socks/app.sock app.asgi:application
+# CMD . /venv/bin/activate && gunicorn -b 0.0.0.0:8000 --reload app.asgi:application -k uvicorn.workers.UvicornWorker