Update app.js

app.js

@@ -4,7 +4,7 @@ const fs = require('fs');
 const app = express();
 const PORT = 3000;
 
-app.use(express.static(path.join(__dirname, 'public')));
+app.use('/', express.static(path.join(__dirname, 'public')));
 
 function getFiles(directoryPath) {
     let results = [];