add child apps

app-of-apps/app2.yaml

@@ -0,0 +1,16 @@
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: app-of-apps-3
+  namespace: argocd
+  finalizers:
+  - resources-finalizer.argocd.argoproj.io
+spec:
+  destination:
+    namespace: default
+    name: in-cluster
+  project: default
+  source:
+    path: example-app
+    repoURL: https://github.com/acend/argocd-training
+    targetRevision: HEAD