This is a working example of a multi-container flask application with Postgres as the database fronted by the nginx reverse proxy. See my blog post for a detailed explanation.
- Bootstrap the DB
$ docker-compose up -d db $ docker-compose run --rm flaskapp /bin/bash -c "cd /opt/services/flaskapp/src && python -c 'import database; database.init_db()'"
- Bring up the cluster
$ docker-compose up -d
- Browse to localhost:8080 to see the app in action.