Hi @Hectorson, this can almost certainly be achieved with a Pi and it might be more straightforward than I initially feared. I believe that this is the extension you want to run:
It’s not clear that Docker is required, do you have the reference that made you think so, please?
IF it doesn’t need Docker then installing DietPi and the extension manager should do the trick. It may be a little taxing if your tech skills aren’t strong but with a bit of patience and assistance you’ll get there. Feel free to ask here and I’ll do my best to help.