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> This can be a great way to get a CLI tool loaded into a bespoke CI environment.


Okay, you have the CLI tool in one or more isolated Docker instances. What then?


No, you start the docker container to run the CLI tool, because the tool is exported as the CMD for the image, like this one [1]

[1] https://hub.docker.com/r/mesosphere/aws-cli/


I had no idea you could run a Docker image as a command. I thought it simply allowed you to run light weight VMs running on the same kernel.




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