How to make Custom Image

Referring to images unambiguously

Previously, when we named our image, we simply called it railsapp. Similarly, Compose automatically named our web service image myapp_web.

Although these names worked fine when working on a single Docker Machine, they are not suitable for sharing our image on a Docker Registry. Why? Because what if different people, teams, or organizations all want to have an image called railsapp or myapp_web?

How would we know which image to refer to?

This is a solved problem. By referring to ...