OSX support

[andrewshawcare]

I know the README says it's not currently supported, but it would be helpful to test out our Fargate task definition locally using docker-compose before we deploy it. We have a Jenkins agent in a container that we would like to see running the builds successfully locally before we deploy and don't have access to a linux host. I presume the agent will work, but it's difficult to be confident without the ability to test locally.

Running the image doesn't help as the goal is to have the Jenkins agent building without access to the docker daemon.

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[kekoav]

MacOS is supported indirectly using Docker.. if you are running Jenkins agent in a container, that's within Docker I presume? If so you can run img the same way within Docker.