Add 3 latest docker versions on Container Registry test
What does this MR do and why?
The container registry stores and manages private container images and other artifacts, similar to the way Docker Hub stores public Docker container images. You can use the Docker command-line interface (Docker CLI) for login, push, pull, and other container image operations.
To connect to it we can use several different clients. This tests using docker versions 20.x.x, 19.x.x and 18.x.x which are the most widely used, with their respective docker-in-docker (dind) images.
Edited by Sofia Vistas