I set garage via docker and it was not impossibly hard.
Main problem is that there isn't an admin panel and you can't login to the docker container via docker exec, so you have to write some python (or other language of your choice) to send requests to the API port to:
This is correct, I already installed the minio cli, but when I came back and read this, I tried it out and yes, once garage is running in the container, you can
alias garage="docker exec -ti <container name> /garage"
so you can do the cli things like garage bucket info test-bucket or whatever. The --help for the garage command is pretty great, which is good since they don't write it up much in the docs.