Create a new secret for use with Docker registries. Dockercfg secrets are used to authenticate against Docker registries. When using the Docker command line to push images, you can authenticate to a given registry by running: '$ docker login DOCKER_REGISTRY_SERVER --username=DOCKER_USER --password=DOCKER_PASSWORD --email=DOCKER_EMAIL'. That produces a ~/.dockercfg file that is used by subsequent 'docker push' and 'docker pull' commands to authenticate to the registry. The email address is optional. When creating applications, you may have a Docker registry that requires authentication. In order for the nodes to pull images on your behalf, they must have the credentials. You can provide this information by creating a dockercfg secret and attaching it to your service account.

public static IEnumerable<string> KubectlCreateSecretDockerRegistryWithResult(this ICakeContext context, KubectlCreateSecretDockerRegistrySettings settings)