Perhaps this article from Julia Evans can be useful for people using
nginx...

https://jvns.ca/blog/2021/09/24/new-tool--an-nginx-playground/

The first paragraph is:
New tool: an nginx playground

Hello! On Wednesday I was talking to a friend about how it would be cool to
have an nginx playground website where you can just paste in an nginx
config and test it out. And then I realized it might actually be pretty
easy to build, so got excited and started coding and I built it. It’s at
https://nginx-playground.wizardzines.com.
Kind regards,
--
Oscar Fernandez Sierra
oscaretu@gmail.com
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