Change Docker for Mac detection
Created by: daxmc99
Detect if we are on docker for mac via host.docker.internal
DNS entry
Fixes https://github.com/sourcegraph/sourcegraph/issues/23477
Added a test that should fail if this changes
Created by: daxmc99
Detect if we are on docker for mac via host.docker.internal
DNS entry
Fixes https://github.com/sourcegraph/sourcegraph/issues/23477
Added a test that should fail if this changes