upstream node_siteA {
        server 127.0.0.1:4567;
}

server {
        listen 80;

        server_name siteA.example.com;
        root /var/www/node/siteA/;

        location / {
                resolver 8.8.8.8 valid=5s;
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header Host $http_host;
                proxy_set_header X-NginX-Proxy true;

                proxy_pass http://node_siteA/;
                proxy_redirect off;

                # Socket.io Support
                proxy_http_version 1.1;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection "upgrade";
        }
}