nginx try_files with a proxy_pass

gistfile1.txt

server {
  root /var/www/example.com/static;
  server_name example.com;
  access_log /var/log/nginx/example.com.access.log;
  error_log /var/log/nginx/example.com.error.log;

  try_files /maintenance.html @proxy;

  location @proxy {
    proxy_pass http://127.0.0.1:10001;
    include /etc/nginx/proxy.conf;
  }
}