Federation examples

I hope this is a simple request for the #federation ‘team’ …

Would it be possible for one of you to produce a working example of 2 cross communicating federation clients on the remotely accessible same machine - and then share the (redacted) component source files? (as well as any required specific DNS changes - as in only A entries?)
I would expect that there would be an nginx directory (and yaml/conf doc)
and 2 separate Corteza directories (each with yaml/.env - including build number last tested on)

I would also ‘expect’ that all that would need to be changed would be the .env file - between the instances AND with resultant implementations, such that there should ‘likely’ be a section on instance variances

TIA (for consideration and, hopefully, availability)
John

I should add, that based on initial findings, when running on the same machine, CORS seems to need to be enabled…
So - how would we go about adding config directives for the running service -
in yaml? in additional nginx.conf?
(or is that unnecessary?)