Example app.
Pycharm - mark each package as Sources Root.
Console - make dev to install each subpackage in editable mode.
# Start everything
docker-compose up --build
# Black formatting
docker-compose exec -T app black -l 120 ./
# isort
docker-compose exec -T app isort --recursive ./
# flake8 checks
docker-compose exec -T app flake8 --max-line-length 120 ./