upstream unicorn {
  server unix:/tmp/unicorn.my_app_name.sock fail_timeout=0;
}

server {
  listen 80 default deferred;
  # server_name the_name_of_my_server;

  root /my/app/public/root;
  try_files $uri/index.html $uri @unicorn;
  location @unicorn {
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header Host $http_host;
    proxy_redirect off;
    proxy_pass http://unicorn;
  }

  error_page   500 502 503 504  /500.html;
  client_max_body_size 4G;
  keepalive_timeout 10;
} 
