add local cluster config

ctrl/kind-config.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+set -euo pipefail
+cd "$(dirname "$0")"
+
+if kind get clusters 2>/dev/null | grep -qx eth; then
+    echo "kind cluster 'eth' already exists"
+else
+    echo "creating kind cluster 'eth'..."
+    kind create cluster --config k8s/kind-config.yaml
+fi
+
+kubectl config use-context kind-eth