This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/factory/totest/containers/opensuse/stunnel:5
  docker pull registry.opensuse.org/opensuse/factory/totest/containers/opensuse/stunnel:5.76
  docker pull registry.opensuse.org/opensuse/factory/totest/containers/opensuse/stunnel:5.76-7.56
  docker pull registry.opensuse.org/opensuse/factory/totest/containers/opensuse/stunnel:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.