server.js

const http = require('http');
const fs = require('fs');
const path = require('path');

const PORT = process.env.PORT || 3000;

const server = http.createServer((req, res) => {
  const filePath = path.join(__dirname, req.url === '/' ? 'index.html' : req.url);
  const extname = path.extname(filePath);
  
  const contentTypes = {
    '.html': 'text/html',
    '.js': 'text/javascript',
    '.css': 'text/css',
    '.json': 'application/json',
    '.png': 'image/png',
    '.jpg': 'image/jpeg',
    '.gif': 'image/gif'
  };

  const contentType = contentTypes[extname] || 'text/plain';
  
  fs.readFile(filePath, (err, content) => {
    if (err) {
      if (err.code === 'ENOENT') {
        res.writeHead(404);
        res.end(`File not found: ${filePath}`);
      } else {
        res.writeHead(500);
        res.end(`Server error: ${err.code}`);
      }
    } else {
      res.writeHead(200, { 'Content-Type': contentType });
      res.end(content, 'utf-8');
    }
  });
});

server.listen(PORT, () => {
  console.log(`Server running on port ${PORT}`);
});