This container can be pulled via:
  docker pull registry.opensuse.org/home/dirkmueller/branches/devel/bci/sle-15-sp6/containerfile/bci/openjdk:21
  docker pull registry.opensuse.org/home/dirkmueller/branches/devel/bci/sle-15-sp6/containerfile/bci/openjdk:21-1.50
  docker pull registry.opensuse.org/home/dirkmueller/branches/devel/bci/sle-15-sp6/containerfile/bci/openjdk:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.