const express = require('express'); const fs = require('fs'); const path = require('path'); const app = express(); const PORT = process.env.PORT || 7860; app.use(express.static('public')); app.use('/music', express.static('music')); app.get('/tracks', (req, res) => { fs.readdir('music', (err, files) => { if (err) { return res.sendStatus(500); } res.json(files.filter(file => file.endsWith('.mp3'))); }); }); app.listen(PORT, () => console.log(`Server running on port ${PORT}`));