init nodejs

hello_world/app.js

@@ -0,0 +1,16 @@
+'use strict';
+
+const express = require('express');
+
+// Constants
+const PORT = 3000;
+const HOST = '0.0.0.0';
+
+// App
+const app = express();
+app.get('/', (req, res) => {
+  res.send('Hello World');
+});
+
+app.listen(PORT, HOST);
+console.log(`Running on http://${HOST}:${PORT}`);

hello_world/package.json

@@ -0,0 +1,13 @@
+{
+  "name": "docker_web_app",
+  "version": "1.0.0",
+  "description": "Node.js on Docker",
+  "author": "First Last <first.last@example.com>",
+  "main": "server.js",
+  "scripts": {
+    "start": "node server.js"
+  },
+  "dependencies": {
+    "express": "^4.16.1"
+  }
+}