Can someone please help me regarding ratchet library on nginx

Hi,

I’m new to vps hosting and my website is hosted on digitalocean, I’m using ratchet library (http://socketo.me) for my php application. It’s working on localhost but not in server.

server.php

   <?php
    use Ratchet\Server\IoServer;
    use Ratchet\Http\HttpServer;
    use Ratchet\WebSocket\WsServer;
    use MyApp\Chat;
    
        require dirname(__DIR__) . '/vendor/autoload.php';
    
        $server = IoServer::factory(
            new HttpServer(
                new WsServer(
                    new Chat()
                )
            ),
            8080
        );
    
        $server->run();

In my client side code:

 if(window.WebSocket){
           var conn = new WebSocket('wss://mydomain.com');
           ......
           ......
        }

In my nginx configuration file (/etc/nginx/sites-available/mydomain.com )

 server {
        server_name mydomain.com www.mydomain.com;
        root /var/www/www.mydomain.com;
    
        index index.html index.htm index.php;
    
        location / {
            try_files $uri $uri/ =404;
        }
    
        location ~ \.php$ {
            include snippets/fastcgi-php.conf;
            fastcgi_pass unix:/var/run/php/php7.4-fpm.sock;
         }
    
        location ~ /\.ht {
            deny all;
        }
    
    
        listen 443 ssl; # managed by Certbot
        ssl_certificate /etc/letsencrypt/live/mydomain.com/fullchain.pem; # managed by Certbot
        ssl_certificate_key /etc/letsencrypt/live/mydomain.com/privkey.pem; # managed by Certbot
        include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
        ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
    
    
     }
    server {
        if ($host = www.mydomain.com) {
            return 301 https://$host$request_uri;
        } # managed by Certbot
    
    
        if ($host = mydomain.com) {
            return 301 https://$host$request_uri;
        } # managed by Certbot
    
    
        listen 80;
        server_name mydomain.com www.mydomain.com;
        return 404; # managed by Certbot
    
    
    
    }

In my console it says

“WebSocket connection to ‘wss://mydomain.com/’ failed: Error during WebSocket handshake: Unexpected response code: 200”

note: my domain has ssl. I’m new to this stuff, can somebody please guide me.

Thanks in advance!