skupper-docker doesn't work on MacOS

[hguerrero]

When trying to expose a service running skupper-docker, the networking management is different from Linux making if not work.

[pwright]

I tried running on macos, and while skupper-docker status looks good, I can see that the skupper-service-controller container isn't running

[ajssmith]

Attempt to address differences in networking on mac from linux. Introduced "host.docker.internal:host-gateway" for host service which is understood to be used in Mac/Windows docker environments.

[burrsutter]

I would love to see this working as many architects who have to determine if they use Skupper in their solution use MacOS