Using two different docker-compose files, one using the local build context and one to deploy using the container registry.

This should allow the docker container registry to pick up the proper
image during the jenkins auto deployment.

Reading it inside docker-compose.

Using port 80 for docker-compose service, reordering Dockerfile for faster rebuilds at the cost of an additionaly RUN.

The development server uses docker-compose run and mounts the
app directory. It then runs the flask development server.
The production server uses docker-compose up and runs flask as a
uwsgi app behind nginx. It does not mount app.