https://devcenter.heroku.com/articles/container-registry-and-runtime
Install these packages for Postgresql and Pillow support.
sudo apt-get install libpq-dev postgresql postgresql-contrib
sudo apt-get install libtiff5-dev libjpeg8-dev zlib1g-dev libfreetype6-dev liblcms2-dev libwebp-dev tcl8.6-dev tk8.6-dev python-tk
Use ./generate-secret-key.py to create SECRET_KEY and NEVERCACHE_KEY, set them in your environment.
Build development environment manually
docker-compose build && docker-compose up
Or via the watchdog script
python watcher.py