node.js如何访问其html文件

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

const server = http.createServer((req, res) => {
  if (req.url === '/') {
    // 读取HTML文件
    fs.readFile('index.html', 'utf8', (err, data) => {
      if (err) {
        res.writeHead(404, {'Content-Type': 'text/plain'});
        res.end('File not found');
      } else {
        res.writeHead(200, {'Content-Type': 'text/html'});
        res.end(data);
      }
    });
  }
});

server.listen(3000, () => {
  console.log('Server is running on port 3000');
});