improve init script

init_cluster..sh

@@ -70,7 +70,9 @@ data:
 EOF
 #6. Install Kind LoadBalancer
 kubectl label node kind-control-plane node.kubernetes.io/exclude-from-external-load-balancers-
-git clone https://github.com/kubernetes-sigs/cloud-provider-kind.git
+if [ ! -d "cloud-provider-kind" ]; then
+  git clone https://github.com/kubernetes-sigs/cloud-provider-kind.git
+fi
 docker compose -f manifests/kind-cloud-provider.yaml up -d
 #7. Install Ingress
 kubectl apply -f manifests/ingress.yaml