I wanted to upgrade my server to Ubuntu 20.04, so I've redone the packaging of the server side of this project as a docker compose script.  Using 250MB of containers to do the job of 25k of scripts isn't something I'm proud of, but I've got a few other containers running now so it fits into a flow.

I've also bumped the dependencies to ones without vulnerabilities in (Pillow), moved from Python 3.6 to Python 3.8, unified on a single XML library (lxml), and made the logging less crap.