upstream bakservers-new-auto-change--with-backup {
   server 127.0.0.1:80 ; 
   server 127.0.0.1:81 backup;  
}

server {
   listen 8080 ;
   server_name qp.mpapi.co ; 
   location / {
       proxy_pass http://bakservers-new-auto-change--with-backup ;  
       proxy_http_version 1.1;
       proxy_set_header Connection "";
       proxy_set_header Host qp.mpapi.co;

         add_header Access-Control-Allow-Origin *;
         add_header Access-Control-Allow-Headers X-Requested-With;
         add_header Access-Control-Allow-Methods GET,POST,OPTIONS;
   }
}