This container can be pulled via:
  docker pull registry.opensuse.org/home/dancermak/bci/tumbleweed/containerfile/bci/openjdk:15
  docker pull registry.opensuse.org/home/dancermak/bci/tumbleweed/containerfile/bci/openjdk:15-1.3

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.