Simple HTTP proxy

proxy.js

const http = require("http");

const { PORT, PROXY_HOST, PROXY_PORT } = process.env;

http
  .createServer((req, res) => {
    const proxyRequest = http
      .request({
        hostname: PROXY_HOST,
        port: PROXY_PORT || 80,
        path: req.url,
        method: req.method,
        headers: {
          ...req.headers,
          host: PROXY_HOST,
        },
      }, proxyRes => {
        res.writeHead(proxyRes.statusCode, proxyRes.headers);
        proxyRes.pipe(res, { end: true })
      });

    req.pipe(proxyRequest, { end: true });
  })
  .listen(PORT);