worker_processes  1;

events {
    worker_connections  1024;
}


http {
    include       mime.types;
    default_type  application/octet-stream;

    sendfile        on;
    keepalive_timeout  65;

    upstream servers {
    server <prod_server_ip>:<prod_server_port>;
    server <temp_server_ip>:<temp_server_port>;
  }
 

    server {
                    listen       80;
                    server_name  <your_domain_name>;
                    server_name_in_redirect off;
                    port_in_redirect        off;
    
                    location / {

                              proxy_set_header  X-Real-IP  $remote_addr;
                              proxy_set_header  X-Real-Host  $host;       
                              proxy_pass        http://servers;
                    }
                            
                    error_page   500 502 503 504  /50x.html;
                    location = /50x.html {
                        root   html;
                    }
    }
}