I have nginx-proxy docker container on top of vaultwarden - there aren't any alias directives there. Vaultwarden itself appears to use rust with some http framework called "rocket" [1]. Sorry I'm not familiar with rust world.

But anyways, said vuln doesn't apply to vaultwarden.

[1] https://github.com/dani-garcia/vaultwarden/blob/19e671ff25bf...

Vaultwarden does not include or use nginx, and neither does its official Docker image. Unless you are using nginx yourself (you'd know) this does not affect you.