CertificateToPem ...

GenerateCACert creates the self-signed CA cert and private key it will be used to sign the webhook server certificate.

GenerateCertPem takes the results of GenerateCACert and uses it to create the PEM-encoded public certificate and private key, respectively.

getContainersFromPodOrDeployment returns the containers from a kubernetes object.

TODO ideally should invalidate cache when config map is updated instead of every 5 seconds, well something is better than nothing.

PrivateKeyToPem Creates PEM block from private key object.