Were you ever able to figure this out? I just recently started messing around with Docker and thinking about switching my current RPi 3 setup to using Docker. I’ll mess around with it tomorrow to see if I can get docker-compose to work. It would be nice if we could get Docker-Compose as a part of dietpi-software.
In reply to my previous post. Trying to install via pip threw some errors and failed.
Instead do a “sudo apt install docker-compose” and it will install v18 of docker-compose. Just remember to specify services version 2 in your docker-compose.yml file rather than version 3 otherwise docker-compose will fail to bring up your services.