Add an example of Node.js app.

Author: kz0817

node/app1/app.js

@@ -0,0 +1,11 @@
+var express = require("express");
+var app = express();
+
+app.get("/", function(req, res, next){
+    res.json({"name": "dog"});
+});
+
+var server = app.listen(process.env.PORT || 3000, function(){
+    console.log("Node.js is listening to PORT:" + server.address().port);
+});
+

node/app1/package.json

@@ -0,0 +1,14 @@
+{
+  "name": "app1",
+  "version": "1.0.0",
+  "description": "Application 1",
+  "main": "app.js",
+  "scripts": {
+    "start": "node app.js"
+  },
+  "author": "Kazuhiro Yamato",
+  "license": "MIT",
+  "dependencies": {
+    "express": "^4.15"
+  }
+}