reduce lib installed, collect static during build
- keep app and test related libs but remove sphinx and django-extensions related dependencies.
- remove apache2-dev
- collect static, and get ready to copy it on startup if needed to be serve by another container
- gunicorn only reload when used in docker-compose
- none root user
- run migration on startup
- copy static files to $STATIC_ROOT_ON_STARTUP_COPY when mounted
- add helm chart
- use PostgreSQL from zolando
Closes #271 Closes #272