added routing

 var express = require('express');
-var router = require('./routes/index');
 var app = express();
+var fs = require('fs')
 
-app.use('/', router);
+app.use('/',(req, res) => {
+  res.writeHead(200, {'Content-Type':'text/html'})
+  fs.readFile(__dirname+'/public/index.html', (err,data)=>{
+    if (err) {
+            console.error(err)
+            return res.status(500).json(err)
+        }
+        else res.end(data, 'utf-8')
+  })
+})
 
 var server = app.listen(3000);