more verbose docker-compose up for debugging

[Erdaza]

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[alexzorin]

I think if we want to improve this, we could call .wait(MAX_SUBPROCESS_WAIT) on the returned process, check that its exit code is 0, and raise an exception if it isn't.

That way, if Popen or docker-compose fail, they should fail fast (instead of after 5 minutes), and the stderr will be printed anyway.