While building a musicbrainz-docker.

MacMini 2018-Intel, MacOS, Big Sur 11.5
MusicBrainz Docker: v-2021-06-14
Docker Compose: 1.29.2
Docker Client/Server: 20.10.7/20.10.7

Error:
#9 1.955 Fatal error: Failed all attempts to refresh PGP keys.
#9 1.955 Try passing a list of PGP servers that work for you as build argument:
#9 1.955
#9 1.955 docker-compose build --build-arg PGP_SERVERS="LIST" musicbrainz
#9 1.955
#9 1.955 Current LIST is "ha.pool.sks-keyservers.net ipv4.pool.sks-keyservers.net p80.pool.sks-keyservers.net:80"