This container can be pulled via:
  docker pull registry.opensuse.org/devel/kubic/containers/containerfile/opensuse/openjdk:15
  docker pull registry.opensuse.org/devel/kubic/containers/containerfile/opensuse/openjdk:15.0.10
  docker pull registry.opensuse.org/devel/kubic/containers/containerfile/opensuse/openjdk:15.0.10.18.2371

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.