I failed this review audit, but I believe this question belongs on ServerFault since there is no specific question regarding programming, errors, etc, and it asks about http-proxying, web server integration with cloudflare, and other topics not quite related to StackOverflow.
It also requests opinions and is thus a candidate for closing as "primarily opinion based". I would say that it seems to be very well researched and thus is still a high quality post on ServerFault, but this seems to be a bad review audit in any case.
Am I wrong that this is off topic for StackOverflow?
Should the question be closed altogether since it asks for opinions?