add dashboard

k8s-single-node/cluster.tf

@@ -7,6 +7,9 @@ resource "rke_cluster" "cluster" {
     role    = ["controlplane", "worker", "etcd"]
     ssh_key = "${file("../ssh-terraform-hetzner")}"
   }
+  addons_include = [
+    "https://raw.githubusercontent.com/kubernetes/dashboard/v2.5.1/aio/deploy/recommended.yaml"
+  ]
 }
 
 resource "local_sensitive_file" "kube_config" {