DenisSlider2000/backend/index.js

const fs = require('fs');
const https = require('https');
const express = require('express');
const socketio = require('socket.io');
const app = express();

const https_options = {
    key: fs.readFileSync('./privkey.pem'),
    cert: fs.readFileSync('./fullchain.pem'),
    requestCert: false,
    rejectUnauthorized: false
}
const server = https.createServer(https_options, app);

const io = socketio(server, {
    cors: {
        origin: "https://danby.aniere.fr",
    },
    secure: true
});

usersConnected = 0

io.on("connection", (client) => {
    
    usersConnected++;

    client.on("disconnect", () => {
        usersConnected--;
        io.sockets.emit("update-count", {value: usersConnected});
    });

    io.sockets.emit("update-count", {value: usersConnected});
});  

server.listen(3000, () => {
    console.log("Server started on port 3000");
});