add application of applications example (#29)

* add application of applications example

* Add a link in the readme

applications-helm/values-staging.yaml

@@ -0,0 +1,19 @@
+config:
+  url: https://argocd_url
+  #idcConfig:
+  #  name: Okta
+  #  clientID:
+  #  clientSecret:
+  #  issuer:
+
+applications:
+  - name: app_name
+    project: project
+    destination:
+      namespace: namespace
+    git:
+      url: url
+      branch: branch
+      path: path #path to the value file
+    value_files:
+    - values-staging.yaml