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

app.get('/', (req, res) => {
  res.json({
    message: '测试服务器运行正常',
    timestamp: new Date().toISOString()
  });
});

app.listen(PORT, () => {
  console.log(`测试服务器正在端口 ${PORT} 上运行`);
});