This container can be pulled via:
  docker pull registry.opensuse.org/home/defolos/bci/staging/sle-15-sp6/6-1387/containerfile/suse/alertmanager:0.26
  docker pull registry.opensuse.org/home/defolos/bci/staging/sle-15-sp6/6-1387/containerfile/suse/alertmanager:0.26-35.6
  docker pull registry.opensuse.org/home/defolos/bci/staging/sle-15-sp6/6-1387/containerfile/suse/alertmanager:0.26.0
  docker pull registry.opensuse.org/home/defolos/bci/staging/sle-15-sp6/6-1387/containerfile/suse/alertmanager:0.26.0-35.6
  docker pull registry.opensuse.org/home/defolos/bci/staging/sle-15-sp6/6-1387/containerfile/suse/alertmanager:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.