如何使此删除路由在我的products.js路由中工作？

const express = require('express');
const router = express.Router();

// DELETE route for deleting a product
router.delete('/:id', (req, res) => {
  const productId = req.params.id;
  // 在这里编写删除产品的逻辑
  // ...

  res.send('Product deleted successfully');
});

module.exports = router;

const productId = '123'; // 要删除的产品的ID
fetch(`/products/${productId}`, {
  method: 'DELETE'
})
  .then(response => response.text())
  .then(data => {
    console.log(data); // 输出服务器返回的消息
    // 在这里执行其他操作，如更新UI等
  })
  .catch(error => {
    console.error('Error:', error);
  });

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

// 中间件用于解析请求体
app.use(express.json());
app.use(express.urlencoded({ extended: false }));

// 将products.js路由与应用程序关联起来
const productsRouter = require('./routes/products');
app.use('/products', productsRouter);

// 其他中间件和路由...

// 启动服务器
app.listen(3000, () => {
  console.log('Server started on port 3000');
});