[fleetfox]

Django is WSGI/ASGI framework not a webserver. What do they actually use to terminate HTTP?

[manfre]

Not sure about what Meta is using for Threads, but gunicorn and nginx are a common set up for Django in production.

Some will use `python manage.py runserver` in production, and they are using the defacto wrong set up. Don't ever do that.

[freeplay]

Most likely a reverse proxy of some sort.