node-test/app.js

const express = require('express');

const PORT = 8900;
const HOST = '0.0.0.0';

const instanceNumber = Math.floor(Math.random() * 101);

const app = express();

app.get('/', (req, res) => {
    var xFwdIp = req.headers['x-forwarded-for'];
    var xRealIp = req.headers['x-real-ip'];
    res.send(
        {
            instanceId: instanceNumber,
            xForwardedFor: xFwdIp,
            xRealIp: xRealIp,
            requestIp: req.ip,
            requestTime: Math.floor(Date.now() / 1000)
        }
    );
});

app.listen(PORT, HOST, () => {
    console.log(`Server started on http://${HOST}:${PORT}`);
});