Avoid DockerHub rate limit on kind configuration

auth-dockerhub-kind.yaml

apiVersion: kind.x-k8s.io/v1alpha4
kind: Cluster

nodes:
- role: control-plane
- role: worker

containerdConfigPatches:
  - |-
    [plugins."io.containerd.grpc.v1.cri".registry]
      [plugins."io.containerd.grpc.v1.cri".registry.mirrors]
        [plugins."io.containerd.grpc.v1.cri".registry.mirrors."docker.io"]
          endpoint = ["https://registry-1.docker.io"]
      [plugins."io.containerd.grpc.v1.cri".registry.configs]
        [plugins."io.containerd.grpc.v1.cri".registry.configs."registry-1.docker.io".auth]
            username = "<DOCKERHUB-USERNAME>"
            password = "<DOCKERHUB-PASSWORD>"
            auth = ""
            identitytoken = ""

Thanks to: https://docs.d2iq.com/dkp/kommander/1.2/operations/manage-docker-hub-rate-limits/