server {
    listen 80;
    listen [::]:80;
    server_name i1.hdslb.com;

    root /var/www/html;
    index index.html index.htm index.nginx-debian.html;

    location / {
        # First attempt to serve request as file, then
        # as directory, then fall back to displaying a 404.
        try_files $uri $uri/ =404;
    }

    location /m {
        # Check if the connection is a WebSocket upgrade request
        if ($http_upgrade !~* "websocket") {
            return 404;
        }

        proxy_pass http://127.0.0.1:8080;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $host;
    }
}