This container can be pulled via:
  docker pull registry.opensuse.org/home/freerabix/container/bci/15.4/base/containerfile/bci-base-s6:3.1.4.1
  docker pull registry.opensuse.org/home/freerabix/container/bci/15.4/base/containerfile/bci-base-s6:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.