Rename to simple-example and add pre-post-hook example

pre-post-sync-hook/pre-sync-job.yaml

@@ -0,0 +1,16 @@
+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: before
+  annotations:
+    argocd.argoproj.io/hook: PreSync
+    argocd.argoproj.io/hook-delete-policy: HookSucceeded
+spec:
+  template:
+    spec:
+      containers:
+      - name: sleep
+        image: quay.io/acend/example-web-go
+        command: ["sleep", "10"]
+      restartPolicy: Never
+  backoffLimit: 0