如何从虚拟内存为node.js中的html+js提供服务？

const http = require('http');

const server = http.createServer((req, res) => {
  // 在这里处理请求和响应
  res.statusCode = 200;
  res.setHeader('Content-Type', 'text/plain');
  res.end('Hello, world!');
});

server.listen(8080, 'localhost', () => {
  console.log('Server running at http://localhost:8080/');
});

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

const server = http.createServer((req, res) => {
  const filePath = path.join(__dirname, 'public', req.url);
  
  fs.readFile(filePath, 'utf8', (err, data) => {
    if (err) {
      res.statusCode = 404;
      res.end('File not found');
      return;
    }

    res.statusCode = 200;
    res.setHeader('Content-Type', 'text/html');
    res.end(data);
  });
});

server.listen(8080, 'localhost', () => {
  console.log('Server running at http://localhost:8080/');
});

node server.js