How do I add subdomain as backend subdomain and function subdomain?

I am unsure about my current setup of my appwrite backend.

So I have a domain example.com and I would like appwrite to be accessible under baas.example.com. Currently my nginx proxy manager forwards request to baas.example.com to my appwrite traefik appwrite-traefik:80 instance. Which works fine.

My appwrite functions are accessible using baas.example.com/functions/....

My .env file contains the following entries:

_APP_DOMAIN=baas.example.com
_APP_DOMAIN_FUNCTIONS=function.example.com
_APP_DOMAIN_TARGET=baas.example.com

Is this the correct setup? And what exactly is the difference between _APP_DOMAIN and _APP_DOMAIN_TARGET_?

And how do I setup my functions endpoint (domain)? My desired endpoint is function.example.com?

How do I add subdomain as backend subdomain and function subdomain?

Seems fine.

You need another entry in NPM to forward function.example.com to Appwrite

But should _APP_DOMAIN and _APP_DOMAIN_TARGET be the same? What is the difference?
When using the function.example.com domain to access the functions, do I still use the pattern functions.example.com/functions/... or does it have a different pattern?

App domain and app domain target are usually the same. The target is used for adding a custom domain for a project. It validates the custom domain is pointed to the right thing.

The function domain allows you to hit your function directly and not follow the usual requirements of hitting Appwrite's APIs