gistfile1.txt

    location / {
      rewrite ^(.+)/$ $1 permanent;

      proxy_pass         http://upstream.app;
      proxy_redirect     off;
      proxy_set_header   Host             $host;
      proxy_set_header   X-Real-IP        $remote_addr;
      proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;
      proxy_set_header   X_Forwarded_Proto  $scheme;

      client_max_body_size       10m;
      client_body_buffer_size    128k;

      proxy_connect_timeout      120;
      proxy_send_timeout         120;
      proxy_read_timeout         120;

      #proxy_buffering off;
      proxy_buffers 8 16k;
      proxy_buffer_size 32k;
      # proxy_buffer_size          4k;
      # proxy_buffers              4 32k;
      proxy_busy_buffers_size    64k;
      proxy_temp_file_write_size 64k;

      index  index.html index.htm;
    }