Не могу запустить django, установленную внутри docker

Question

Я использую Docker для запуска моего приложения, которое импортирует django. Я хочу сделать это в моем git хранилище. Мой Dockerfile выглядит как

FROM python:3

WORKDIR /configurator

CMD virtualenv -p python3.8 venv
CMD . venv/bin/activate
CMD pip install -U setuptools pip
CMD pip install django

COPY . /configurator/

CMD cd cconfigurator/

ENTRYPOINT /configurator/cconfigurator/manage.py runserver 8000

И я вижу ошибку:

docker run configurator
Traceback (most recent call last):
  File "/configurator/cconfigurator/manage.py", line 10, in main
    from django.core.management import execute_from_command_line
ModuleNotFoundError: No module named 'django'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/configurator/cconfigurator/manage.py", line 21, in <module>
    main()
  File "/configurator/cconfigurator/manage.py", line 12, in main
    raise ImportError(
ImportError: Couldn't import Django. Are you sure it's installed and available on your PYTHONPATH environment variable? Did you forget to activate a virtual environment?

Что я делаю не так?