Express JavaScript

import express from 'express';

const GIF = Buffer.from('R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==', 'base64');

const app = express();

app.get('/pixel.gif', (req, res) => {
  res.set('Cache-Control', 'no-store');
  res.type('gif').send(GIF);
});

app.listen(8080);