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/minikube/Dockerfile

@@ -0,0 +1,4 @@
+FROM node:6.14.2
+EXPOSE 8080
+COPY server.js .
+CMD node server.js

content/zh/examples/minikube/server.js

@@ -0,0 +1,9 @@
+var http = require('http');
+
+var handleRequest = function(request, response) {
+  console.log('Received request for URL: ' + request.url);
+  response.writeHead(200);
+  response.end('Hello World!');
+};
+var www = http.createServer(handleRequest);
+www.listen(8080);