The readme has some commands which are duplicated due to different container names in different versions of docker:

Run bash in the container: sudo docker exec -ti musicbrainzdocker_musicbrainz_1 bash. (Or sudo docker exec -ti musicbrainz-docker_musicbrainz_1 bash if docker-compose --version is higher than 1.20.1.)

It seems that this would be easier to explain if this was replaced with a docker-compose exec musicbrainz example instead, which should just work regardless of what the version of docker is