Steam with server_name/reverse proxy with no http/https source port?

[Arthurdw]

How can I achieve the following?

Example service structure:
http server: 10.10.10.10:20080
ssh server: 10.10.10.10:20022

What I want to achieve
git.example.com:443 -> 10.10.10.10:20080 (this works as usual with the reverse proxy)
git.example.com:22 -> 10.10.10.10:20022 (this doesn't seem possible right now?)

Some help would greatly be appreciated! Thanks for your time!

[Arthurdw]

Dupe of #3335