Unify app server: Gunicorn or uWSGI or other?

[aufdenkampe]

WOFpy uses uWSGI application server framework, and it looks to be much faster than Gunicorn. See https://blog.kgriffs.com/2012/12/18/uwsgi-vs-gunicorn-vs-node-benchmarks.html

Since we'll want to unify the stack, let's consider switching to uWSGI. https://uwsgi-docs.readthedocs.io