policy.json

{
    "default": [
        {
            "type": "reject"
        }
    ],
    "transports": {
        "docker": {
            "registry.access.redhat.com": [
                {
                    "type": "signedBy",
                    "keyType": "GPGKeys",
                    "keyPath": "/etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release"
                }
            ],
            "registry.redhat.io": [
                {
                    "type": "signedBy",
                    "keyType": "GPGKeys",
                    "keyPath": "/etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release"
                }
            ],
            "quay.io/bluecmd": [
                {
                    "type": "signedBy",
                    "keyType": "GPGKeys",
                    "keyPath": "/dev/null"
                }
            ]
        },
        "docker-daemon": {
            "": [
                {
                    "type": "reject"
                }
            ]
        }
    }
}