init commit. working to connect express server to react with socket io

index.js

@@ -0,0 +1,29 @@
+const express = require('express');
+const app = express();
+const cors = require('cors');
+
+app.use(cors());
+
+const http = require('http');
+const server = http.createServer(app);
+
+const socketIO = require('socket.io');
+
+const io = socketIO(server, {
+    cors: {
+        origin: 'http://localhost:3000'
+    }
+});
+
+io.on('connection', (socket) => {
+    console.log('client connected: ' + socket.id);
+});
+
+app.use('/', (req, res) => {
+    
+})
+
+app.listen(8000, (err) => {
+    if (err) console.log(err);
+    console.log("Listening on 8000");
+})