a simple node js container platform

container

const execFile = require('child_process').execFile;

var portSet = function(port, fn) {
    var net = require('net')
    var tester = net.createServer()
    .once('error', function (err) { if (err.code != 'EADDRINUSE') return fn(err); fn(null, true) })
    .once('listening', function() {
        tester.once('close', function() { fn(null, false) })
        .close()
    })
    .listen(port)
}

const randPort = Math.floor(Math.random() * (60000 - 10 + 1)) + 10;

//change to your file
const file = __dirname + '/file.js'

portSet(randPort, function (err, yn) {
    if (!yn) {
        console.log(randPort);
    
        const child = execFile('node', [ file ], { env: {port: randPort} },(error, stdout, stderr) => {
            if (error) {
                return;
            }
                
            console.log(stdout);
        });
    }
});