[DRE-maint] Bug#1095736: ruby-rails: upgrade results in "502 Bad Gateway" with nginx proxy

[Jörg-Volker Peetz]

Hi Lucas again,

my description of the configuration wasn't complete. I use unicorn
(6.1.0+git.20250131.1370f52-1) as rack-rails server for redmine. That is: nginx
- unicorn - redmine.

And I'm a little bit unsure if the problem is not due to the newer ruby-rack
version.

Regards,
Jörg.