bootc-base-images/centos-bootc-config.json

{
    "Labels": {
        "containers.bootc": "1",
        "redhat.compose-id": "CentOS-Stream-9-20240212.d.0",
        "redhat.id": "centos",
        "redhat.version-id": "9"
    },
    "Volumes": {
        "/var": {}
    }
}