server.js

const { WebSocketServer } = require('ws');

// Create a WebSocket server listening on port 443
const sockserver = new WebSocketServer({ port: 443 });

sockserver.on('connection', ws => {
  console.log('New client connected!');
  ws.send('connection established');

  ws.on('close', () => console.log('Client has disconnected!'));

  ws.on('message', data => {
    sockserver.clients.forEach(client => {
      console.log(`distributing message: ${data}`);
      client.send(`${data}`);
    });
  });

  ws.onerror = function () {
    console.log('websocket error');
  };
});

console.log(`WebSocket server listening on port 443`);