操作教程怎样写环境、步骤、预期结果和失败排查

New-Item -ItemType Directory -Path .\tutorial-local-demo
Set-Location -LiteralPath .\tutorial-local-demo
Get-Location
node --version

import { createServer } from 'node:http';
const port = Number(process.env.PORT || 4173);
const html = '<!doctype html><html lang="zh-CN"><meta charset="utf-8"><title>本地练习</title><h1>本地教程已启动</h1><p>这是教学首页。</p></html>';
const server = createServer((req, res) => {
  if (req.url !== '/') {
    res.writeHead(404, { 'Content-Type': 'text/plain; charset=utf-8' });
    res.end('Not found');
    return;
  }
  res.writeHead(200, { 'Content-Type': 'text/html; charset=utf-8' });
  res.end(html);
});
server.on('error', (error) => {
  console.error(error.code || error.message);
  process.exitCode = 1;
});
server.listen(port, '127.0.0.1', () => console.log('Local: http://127.0.0.1:' + port));

node .\server.mjs

$response = Invoke-WebRequest -Uri http://127.0.0.1:4173/ -UseBasicParsing
$response.StatusCode
$response.Content.Contains("<h1>本地教程已启动</h1>")