Ping the docker daemon to check if it is up (#1838)
* Ping the docker daemon to check if it is up
* Send a ping to the docker daemon directly using
the golang docker client.
* Give it 5 seconds to answer, if it doesn’t
answer send a warning to the user.
* Move ping from image to docker package
Update ping to return error instead of printing
Update ping to take context and duration arguments
* Add ping checks to push, run, predict, and train subcommands
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Co-authored-by: Mattt Zmuda <mattt@replicate.com>
