app.js

const express = require('express');
const path = require('path');
const fs = require('fs');
const app = express();
const PORT = 3000;

app.use('/', express.static(path.join(__dirname, 'public')));

function getFiles(directoryPath) {
    let results = [];
    const list = fs.readdirSync(directoryPath);
    list.forEach(file => {
        const filePath = path.join(directoryPath, file);
        const stat = fs.statSync(filePath);
        if (stat && stat.isDirectory()) {
            results = results.concat(getFiles(filePath));
        } else {
            results.push(filePath.replace(__dirname, ''));
        }
    });
    return results;
}

app.get('/file-list', (req, res) => {
    res.json(getFiles(__dirname));
});

app.listen(PORT, () => {
    console.log(`Server running on http://localhost:${PORT}`);
});