[zh] Sync changes to Hello Minikube page

This is a sync of English site change (236c65c18e).

content/zh/examples/minikube/Dockerfile

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

content/zh/examples/minikube/server.js

@@ -1,9 +0,0 @@
-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);