This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/factory/powerpc/totest/containers/opensuse/openjdk:15
  docker pull registry.opensuse.org/opensuse/factory/powerpc/totest/containers/opensuse/openjdk:15.0.7
  docker pull registry.opensuse.org/opensuse/factory/powerpc/totest/containers/opensuse/openjdk:15.0.7.4.1689

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.