location /socket.io {
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header Host $host;

                proxy_set_header X-NginX-Proxy true;

                # prevents 502 bad gateway error
                proxy_buffers 8 32k;
                proxy_buffer_size 64k;

                proxy_redirect off;

                # enables WS support
                proxy_http_version 1.1;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection "upgrade";

                proxy_pass http://socket_nodes/socket.io;

        }