微信小程序怎么做服务器端开发

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

app.use(express.json());

let users = [
  { id: 1, name: 'Alice', email: 'alice@example.com' },
  { id: 2, name: 'Bob', email: 'bob@example.com' }
];

app.get('/users', (req, res) => {
  res.json(users);
});

app.post('/users', (req, res) => {
  const newUser = { id: users.length + 1, ...req.body };
  users.push(newUser);
  res.status(201).json(newUser);
});

app.put('/users/:id', (req, res) => {
  const user = users.find(u => u.id === parseInt(req.params.id));
  if (!user) return res.status(404).send('User not found');
  Object.assign(user, req.body);
  res.json(user);
});

app.delete('/users/:id', (req, res) => {
  const user = users.find(u => u.id === parseInt(req.params.id));
  if (!user) return res.status(404).send('User not found');
  const index = users.indexOf(user);
  users.splice(index, 1);
  res.status(204).send();
});

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