Merge release 1.14 into 1.15. (#16439)

1. Confirm the document content is similar as en version.
2. Merge the zh release-1.14 version into 1.15 version
3. add the 1.14 all sample into 1.15 for template work. The build looks fine.

- docs
  - concepts
    - architecture

content/zh/examples/application/guestbook/frontend-service.yaml

@@ -0,0 +1,18 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: frontend
+  labels:
+    app: guestbook
+    tier: frontend
+spec:
+  # comment or delete the following line if you want to use a LoadBalancer
+  type: NodePort 
+  # if your cluster supports it, uncomment the following to automatically create
+  # an external load-balanced IP for the frontend service.
+  # type: LoadBalancer
+  ports:
+  - port: 80
+  selector:
+    app: guestbook
+    tier: frontend