Before proceeding further, I'd like to point out I'm not an expert or even proficient in using node.js for applications yet. This is example is as-is and is based on samples found in online sources. Hopefully, it will work just fine for you as well.

First step is to install Node.js that can be downloaded from the Node.js SITE.

Open your terminal application and create a directory for your server and cd into this directory. Then execute this command:

You can accept the default answers for most of the questions. The name you give the application doesn't really matter.

Next step is to install the necessary modules for Web Sockets and the clipboard acces.

Finally, create an index.js file with the following code (find the text file with this code HERE):

// Simple Server for taking input from the Stream Deck dice rollers.  
// There is a server that handles getting a push of the roll from the stream deck and one that handles
// client requests for this data (for example a web page or another application that can do websockets)
//

import { WebSocketServer } from 'ws';
import clipboard from 'clipboardy';

// Current roll value
var rollvalue = 0;

// Hard coding ports - change as needed
// wss is the socket that receives the roll value from the stream deck application
// serverwss is the socket that handles client requests for the current roll value
const wss = new WebSocketServer({ port: 25555 });
const serverwss = new WebSocketServer({port: 25556});

console.log("Starting Roll Receiver Server on Port 25555");
console.log("Starting Client Interface Server on Port 25556");

// Create the connection for the receiving roll value
wss.on('connection', function connection(ws) {
    // On message received write the data to the clipboaord (to allow for pasting) and store the current roll value
    ws.on('message', function message(data) {
    console.log('received: %s', data);
    clipboard.writeSync(data.toString());
    rollvalue = data.toString();
    });
    // Not really needed but I like to respond initiatlly at connection.
    ws.send('SUCCESS');
});

// Create the connection for the server to provide last roll value to a client.
serverwss.on('connection', function connection(ws) {
    // Any message received will trigger returning the current value
    ws.on('message', function message(data) {
    console.log(`Client Request Received: ${data}; Sending value: ${rollvalue}`);
    
    // This is a design choice.  For every client connected, the latest roll is sent regardless of who requested it.
    serverwss.clients.forEach(client => {
        //console.log(`distributing message: ${rollvalue}`)
        client.send(`${rollvalue}`)
        
    });
    });

    

});                         

                        
                    

Before running the application, you will need to edit the package.json file to include: "type": "module". When you are done , the file will look similar to:

Now you are ready to run the server application: