"So why did it say that? I have no idea, but you can ignore it." - because it is "uploaded" from the CLI tool to the daemon. See http://docs.docker.io/en/latest

"So why did it say that? I have no idea, but you can ignore it." - because it is "uploaded" from the CLI tool to the daemon. See http://docs.docker.io/en/latest/use/builder/#usage http://docs.docker.io/en/latest/use/builder/#usage