ImageRepository.spec.certSecretRef

CertSecretRef can be given the name of a secret containing either or both of - a PEM-encoded client certificate (`certFile`) and private key (`keyFile`); - a PEM-encoded CA certificate (`caFile`) and whichever are supplied, will be used for connecting to the registry. The client cert and key are useful if you are authenticating with a certificate; the CA cert is useful if you are using a self-signed server certificate.