simple-permanent-redirect.js

const http = require("http");
const path = require("path");

const target = process.env.TARGET; // ex: google.com
const port = process.env.PORT || 80;

http
  .createServer(({ url, headers }, res) => {
    const protocol = headers["x-forwarded-proto"] || "http";
    res.writeHead(308, { Location: `${protocol}://${path.join(target, url)}` });
    res.end();
  })
  .listen(port);