乘客Nginx proxy_pass

Question

我有一个登陆页面和使用Passenger + Nginx的rails应用程序。 我想做这样的事情：

server {
  listen 80;
  server_name example.com;

    if ( $remote_addr ~* ip-address-here ) {

      root /home/app/public;

     # Turn on Passenger
     passenger_enabled on;
     passenger_ruby /usr/local/rvm/gems/ruby-2.2.4@global/wrappers/ruby;
    }

    #else proxy_pass http://landing_page_ip;
}