bug: Revolt.toml requires two additional fields under smtp

[dollhaus]

https://github.com/revoltchat/backend/blob/main/crates/core/config/Revolt.toml

[api.smtp]
host = "" # do NOT put a port number here, it will not be recognised
username = ""
password = ""
from_address = ""
port = ""
use_tls = true #set to false where host is an IP address 

Note for future documentation: TLS will not function correctly over docker's host adaptor. If SMTP is running on the same machine, and is accessed via 172.17.0.1, the SMTP server should be configured to listen only on the docker interface.

[insertish]

I've added (as comments) the additional optional fields to avoid confusion.