* Kubernetes v1.19 graduated Ingress and IngressClass from networking.k8s.io/v1beta1 to networking.k8s.io/v1
* Add support for IngressClass and RBAC authorization * Since our nginx ingress controller example uses the flag `--ingress-class=public`, add an IngressClass to go along with it Rel: https://kubernetes.io/docs/concepts/services-networking/ingress/#ingress-class