Nothing related to this project at all, and I’m certainly not a Docker expert, but I’ve done things like run a PostgreSQL container in Docker on the Pi. I set it up a while back, and it was not completely seamless, but once it was installed it has been stable. Now I can comfortably take it for granted. Judging by your links, it seems like it’s even more straightforward to get it set up now.
If you’re looking for a hand, I’m definitely up for a real use case to try and build my Docker skills and learn about the food computer. I don’t presently have a food computer, but am hoping to head in that direction in the near future, so anything that would end up making it easier is in my interest.
Where do you see the advantage over provisioning with something more script based than container based? Is there an opportunity to run the code on something that’s not a Pi? Or run multiple instances on a single Pi (one of the more appealing aspects of Docker in my view).