This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/factory/powerpc/totest/containers/opensuse/bci/openjdk-devel:21
  docker pull registry.opensuse.org/opensuse/factory/powerpc/totest/containers/opensuse/bci/openjdk-devel:21.0.7.0
  docker pull registry.opensuse.org/opensuse/factory/powerpc/totest/containers/opensuse/bci/openjdk-devel:21.0.7.0-34.40

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.