Fix server?

server.js

@@ -1,14 +1,14 @@
 const express = require('express');
 const path = require('path');
-const port = 8080;
+const port = process.env.PORT || 8080;
 const app = express();
 
 // the __dirname is the current directory from where the script is running
-app.use(express.static(__dirname));
+app.use(express.static(__dirname + '/public'));
 
 // send the user to index html page inspite of the url
 app.get('*', (req, res) => {
-    res.sendFile(path.resolve(__dirname, 'public/index.html'));
+    res.sendFile(path.resolve(__dirname, 'index.html'));
 });
 
 app.listen(port);