gistfile1.txt

start_server --port=5001  -- node server.js 

server.js

//#!/usr/bin/env node
"use strict";

const http = require('http');

const server_starter_port = process.env['SERVER_STARTER_PORT'];
if (!server_starter_port) {
	console.log('SERVER_STARTER_PORT is not set');
	process.exit(1);
}
console.log(server_starter_port);
const fds = server_starter_port.split(/;/).map( (i) => i.split(/=/) );

const server = http.createServer(function (req, res) {
	res.writeHead(200, {'Content-Type': 'text/plain'});
	res.end('Hello World\n');
});

for (let fd of fds) {
	console.log('listen', fd);
	server.listen({ fd: +fd[1] });
}