Port 55555 blocked by MacOS Big Sur

[CoreForce]

Solace default SMF port 55555 apparently is blocked under MacOS Big Sur.
The issue is a bit irritating, as the port won't show up in any port list of the OS.

Existing templates start silently to fail on simple things like Try-Me with ws protocol (as underlying SMF is not available).
New templates will not start with a "port in use" error.

See
https://apple.stackexchange.com/questions/410987/port-55555-on-mac-os-big-sur-already-in-use
https://developer.apple.com/forums/thread/671197
for reference.

Maybe it might be a good idea to at least create a hint to this in the template?
I've fixed this by mapping port 55555 to 55566 in docker-compose.yml

[Mrc0113]

Thanks @CoreForce, we'll look at adding this!