add busybox debug pod

hack/debug-pod.yaml

@@ -0,0 +1,20 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  name: debugger
+spec:
+  containers:
+    - image: busybox
+      imagePullPolicy: IfNotPresent
+      name: busybox
+      stdin: true
+      stdinOnce: true
+      tty: true
+      volumeMounts:
+        - mountPath: /data
+          name: data
+      resources: {}
+  volumes:
+    - name: data
+      persistentVolumeClaim:
+        claimName: data-headscale-0