This container can be pulled via:
  docker pull registry.opensuse.org/home/ojkastl_buildservice/containers/15.5/containerfile/ojkastl_buildservice/opensuse-leap-dumb-init:15.5
  docker pull registry.opensuse.org/home/ojkastl_buildservice/containers/15.5/containerfile/ojkastl_buildservice/opensuse-leap-dumb-init:15.5-3.9

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.