DockerRegistry runs a throwaway registry for tests using
ghcr.io/gesellix/distribution, a fork of
distribution/distribution. The image
ships a working config (/etc/distribution/config.yml) and serves it by default, so no
extra configuration is mounted.
The default image tag is set in
DockerRegistry and
can be overridden via the DOCKER_REGISTRY_IMAGE_OVERRIDE system property.
See RELEASE.md