Dockerize Flask: Error: While importing ‘app’, an ImportError was raised

Solution

 ~/tmp/so_q $ docker build -t myimage .                                                             8s nathanielford@nford 20:51:04
Sending build context to Docker daemon   5.12kB

...

Successfully tagged myimage:latest
 ~/tmp/so_q $ docker run myimage                                                                   13s nathanielford@nford 20:51:26
 * Environment: production
   WARNING: This is a development server. Do not use it in a production deployment.
   Use a production WSGI server instead.
 * Debug mode: off
 * Running on all addresses.
   WARNING: This is a development server. Do not use it in a production deployment.
 * Running on http://192.168.9.2:5000/ (Press CTRL+C to quit)