Update instructions
Assuming your checked out version of musicbrainz-docker is v-2020-05-18-postgres12 or later, then just run:
git fetch --tags origin && \
git checkout v-2020-06-15 && \
sudo docker-compose up --build -dSolved issue
Other changes
- Enable testing features in development setup
- Upgrade MusicBrainz Server to v-2020-06-15