This container can be pulled via:
  docker pull registry.opensuse.org/devel/bci/tumbleweed/containerfile/opensuse/stunnel:5
  docker pull registry.opensuse.org/devel/bci/tumbleweed/containerfile/opensuse/stunnel:5.74
  docker pull registry.opensuse.org/devel/bci/tumbleweed/containerfile/opensuse/stunnel:5.74-1.23
  docker pull registry.opensuse.org/devel/bci/tumbleweed/containerfile/opensuse/stunnel:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.