Bitwarden + Traefik 2 Setup

I wish there was something official to set this up and my brain is at a breaking point.

I’m using the self hosted install process of Bitwarden.

I have setup my Traefik2 / Portainer using this as a guide:

And trying to use this old thread on how to configure Bitwarden and I’m running into problems.

I can see the entry in the Traefik dashboard, but it keeps giving me “Bad Gateway - openresty” when trying to use my bitwarden domain.

Any Ideas? Bitwarden PLEASE make a guide how to set this up.