I feel like I'm so close to the finish line, by not using mod-wsgi that was packaged by the distro, in this case Alpine, and instead use #mod_wsgi from #pip.

I don't get the segfault core dumped error anymore, which is a huge relief cos that was annoying to debug, but I can't serve my pages yet either. I got this error instead:

Truncated or oversized response headers received from daemon process 'localhost': /base/base/wsgi.py

« Do not try and use a Python virtual environment from one Python installation or version with mod_wsgi, when mod_wsgi was compiled for a different one. »
https://modwsgi.readthedocs.io/en/develop/user-guides/virtual-environments.html#virtual-environment-and-python-version

C'est génial #virtualenv avec #Python, mais #mod_wsgi te remet direct les pieds sur terre.