This container can be pulled via:
  docker pull registry.opensuse.org/systemsmanagement/uyuni/snapshots/2022.03/containers/uyuni/proxy-squid:4.17
  docker pull registry.opensuse.org/systemsmanagement/uyuni/snapshots/2022.03/containers/uyuni/proxy-squid:4.17.4.10.uyuni1
  docker pull registry.opensuse.org/systemsmanagement/uyuni/snapshots/2022.03/containers/uyuni/proxy-squid:beta
  docker pull registry.opensuse.org/systemsmanagement/uyuni/snapshots/2022.03/containers/uyuni/proxy-squid:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.