Added fish-shell auto completion to docker for mac installation guide. (#10786)
Added fish-shell auto completion to docker for mac installation guide. (#10786)

Add fish-shell auto completion to docker for mac installation guide.

thaJeztah/docker.github.io,docker/docker.github.io,thaJeztah/docker.github.io,docker/docker.github.io,docker/docker.github.io,docker/docker.github.io,docker/docker.github.io,thaJeztah/docker.github.io,thaJeztah/docker.github.io,thaJeztah/docker.github.io