Section 2.1.8 forgets to mention that you need to use `docker login` before attempting to push image

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kevinl (37) Offline	May 27, 2017 @ 4:02 PM #1 Section 2.1.8 forgets to inform readers of all levels that they need to (or in most cases) run `docker login` before any attempt to push the example image to the public registry under the user name they already have or have created following the instructions of this book (`docker tag kubia <username>/kubia`)
Marko Lukša (70) Online	May 30, 2017 @ 5:20 AM #2 Thanks! I actually fixed this a while ago, but apparently that was after the previous MEAP update. The new update comes out today or tomorrow.