This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/memcached:1.6
  docker pull registry.opensuse.org/opensuse/memcached:1.6.29
  docker pull registry.opensuse.org/opensuse/memcached:1.6.29-3.91
  docker pull registry.opensuse.org/opensuse/memcached:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.