I’m working on a project using AWS Lightsail instance. The goal is to allow users to expose their local applications to the web without requiring SSH key authentication, Just like Serveo.net and localhost.run.

What I have :

domain name
Server: AWS Lightsail instance running Ubuntu 22.04 LTS

What I want :

When the user runs ssh -R 80:localhost:3000 mydomain.com
He should get a random Public Url (id.domain.com)

Any links wheere I can start ?

I tried Installing nginx

sudo apt update
sudo apt install nginx

sudo nano /etc/nginx/sites-available/default

server {
    listen 80;
    server_name *.mydomain.com;

    location / {
        proxy_pass http://localhost:3000; # Change to your internal service port
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
    }
}

And nodejs express to handle the requests

const express = require('express');
const { NodeSSH } = require('node-ssh');
const app = express();
const ssh = new NodeSSH();

app.use(express.json());

app.post('/create-tunnel', (req, res) => {
    const { user, remotePort } = req.body;
    const localPort = 80; // The port your application runs on

    ssh.connect({
        host: 'localhost',
        username: user,
        // Use password authentication (you may need to handle this securely)
        password: 'user_password',
    }).then(() => {
        ssh.forwardOut(
            '127.0.0.1',
            localPort,
            '127.0.0.1',
            remotePort,
            (err, stream) => {
                if (err) return res.status(500).send('Error creating tunnel.');
                res.send(`Tunnel created for user: ${user}`);
            }
        );
    }).catch(err => {
        res.status(500).send('Error connecting via SSH: ' + err);
    });
});

app.listen(3000, () => {
    console.log('Server running on port 3000');
});

Is there any good tutorials to achieve this goal ?