Windows support

[h-vetinari]

It's already in the description that gunicorn is for unix, however, there's an old issue upstream that would solve this: https://github.com/benoitc/gunicorn/issues/524

[phreed]

There is an update to the gunicorn issue https://github.com/benoitc/gunicorn/pull/2643 An alternative is to use waitress in the Windows context. i.e. https://stackoverflow.com/a/48542020/7363740

Replace gunicorn command with waitress-serve, e.g.:

gunicorn --listen=*:8000 myapp.wsgi:application

...becomes...

waitress-serve --listen=*:8000 myapp.wsgi:application