Even with only one service I still consider Compose to be a necessity. Otherwise you need to manually specify how to mount the volumes, set the environment variables, and forward ports when you run the container. Only the most trivial containers are easily usable with plain `docker run`.
That's a fair point I suppose that docker itself doesn't provide a declarative config for starting containers. But that is also true of a whole bunch of tools which only either provide cli or config but not both
