Improve deployment

[gfolego]

I believe a good deployment option would be to use Docker, and Gunicorn.
Docker should be able to isolate software requirements, avoiding possible conflicts.
Flask states: "Do not use the builtin development server in production". We could consider Gunicorn and/or uWSGI with nginx.

Discussions are welcome.

Reference: http://flask.pocoo.org/docs/0.10/deploying/

[gfolego]

References:

• https://docs.docker.com/engine/userguide/eng-image/dockerfile_best-practices/
• http://flask.pocoo.org/docs/0.10/deploying/wsgi-standalone/