This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/leap/micro/5.3/images/totest/containers/opensuse/leap-micro/5.3/toolbox:11.1
  docker pull registry.opensuse.org/opensuse/leap/micro/5.3/images/totest/containers/opensuse/leap-micro/5.3/toolbox:11.1-2.46
  docker pull registry.opensuse.org/opensuse/leap/micro/5.3/images/totest/containers/opensuse/leap-micro/5.3/toolbox:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.