upstream yourproject {
	server 127.0.0.1:8000;
        server 127.0.0.1:8001;
	server 137.0.0.1:8002;
}

server {
   listen  80;
   server_name  projectname;
   root  /var/www/apps/yourproject/current/public;
   index  index.html index.htm;
   access_log  /var/log/nginx/yourproject.access.log;

   location / {
     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_redirect  false;
     if (-f $request_filename/index.html) {
       rewrite (.*) $1/index.html break;
     }
     if (-f $request_filename.html) {
       rewrite (.*) $1.html break;
     }
     if (!-f $request_filename) {
       proxy_pass http://yourproject;
       break;
     }
   }
   error_page  500 502 503 504  /50x.html;
   location = /500.html {
     root  /var/www/apps/yourproject/current/public;
   }
}