Added the missing server folder

samples/react-socket-io/server/iisnode.yml

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+nodeProcessCommandLine: "D:\Program Files (x86)\nodejs\4.6.0\node.exe"
+debuggingEnabled: true

samples/react-socket-io/server/index.html

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+<h1>SPFx with Socket IO demo</h1>

samples/react-socket-io/server/package.json

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+{
+  "name": "spfx-socket.io",
+  "author": {
+    "name": "Franck Cornu @FranckCornu (http://thecollaborationcorner.com)"
+  },
+  "version": "1.0.0",
+  "private": true,
+  "scripts": {
+    "start": "node server"
+  },
+  "license": "Apache",
+  "dependencies": {
+    "azure": "^1.2.0-preview",
+    "express": "^4.14.0",
+    "socket.io": "^1.4.8"
+  }
+}

samples/react-socket-io/server/server.js

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+// Port will be assigned automatically by the Azure Web App (rocess.env.port ). For localhost debugging, we use 8080.
+// You can use the built-in Visual Studio Code debugger to test the solution locally.
+var port = process.env.port || 8080;
+var app = require('express')();
+var server = require('http').Server(app);
+var io = require('socket.io')(server);
+var azure = require('azure');
+
+server.listen(port);
+
+app.get('/', function (req, res) {
+  res.sendfile(__dirname + '/index.html');
+});
+
+// Service Bus Connection string is retrieved from the app env app settings
+var serviceBusService = azure.createServiceBusService(process.env.AZURE_SERVICEBUS_ACCESS_KEY);
+
+// Listener function to pull the Azure service bus and see if new messages are available
+setInterval(function() {
+
+    serviceBusService.receiveQueueMessage('news', function(error, message){
+        if(!error) {
+
+            // Message received and deleted (default behavior of the service bus)
+            console.log(message);
+
+            // Broadcast to all connected clients
+            io.emit('item:added', message );               
+        }
+    });
+
+}, 5 );