As a user
I want to see a user-friendly error message
so that I am aware of technical problems when opening spenden.wikimedia.de
AC
- nginx shows a beautiful bilingual error page when upstream server (fpm) fails to respond (timeout)
Background
- existing "maintenance mode" page (spenden.wikimedia.de:/usr/share/nginx/www/spenden.wikimedia.de/maintenance_mode/web) could be partially reused