proxy_set_header Host               $host;
proxy_set_header X-Forwarded-For    $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto  $scheme;
proxy_set_header X-Real-IP          $remote_addr;
proxy_set_header X-Retpath          $http_host;

proxy_buffers               4 32k;
proxy_buffer_size           4k;
proxy_busy_buffers_size     64k;
proxy_temp_file_write_size  64k;
