FlagErrorFunc prints an error message which matches the format of the docker/docker/cli error messages
NoArgs validates args and returns an error if there are any args
SetupRootCommand sets default usage, help, and error handling for the root command.
Errors is a list of errors. Useful in a loop if you don't want to return the error right away and you want to display after the loop, all the errors that happened during the loop.
StatusError reports an unsuccessful exit by a command.