Http server for local development in Node.js

http.mjs

#!/usr/bin/env node

// Save this file somewhere and make it executable: `chmod +x http.mjs`, then add to $PATH.
// Just run `http.mjs` from any folder to serve the files.

import { createServer } from 'node:http';
import { join } from 'node:path';
import { createReadStream, existsSync } from 'node:fs';
import process from 'node:process';

const cwd = join(process.cwd(), process.argv[2] || '');
process.chdir(cwd);
const port = Number(process.env.PORT || 3000);
const getPath = (r) => r.url === '/' ? 'index.html' : r.url.slice(1);

createServer((req, res) => {
    const p = join(cwd, getPath(req));

    if (existsSync(p)) {
        createReadStream(p).pipe(res);
        return;
    }

    res.writeHead(404).end('Not found: ' + req.url);
}).listen(port, () => console.log(`${cwd}\nListening on http://localhost:${port}`));