This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/opensuse/memcached:1.6
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/opensuse/memcached:1.6.40
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/opensuse/memcached:1.6.40-3.1506
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/opensuse/memcached:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.