Start deprecating docker images that are built in the official repository

[gdams]

We now have official images being built at https://hub.docker.com/_/adoptopenjdk

So far we build all releases for Ubuntu 18:04 and all windows releases. We don't build nightlies or slim builds in the official repo though.

I would propose that we start by deprecating the windows images as they were the most recently added so probably have the least number of users. To deprecate the images we'll need to delete all matching tags, remove the platform from the build job and then add a notice to the top of the README in dockerhub pointing to the new repo.

CC @dinogun

[chadlwilson]

Would you plan to deprecate only the images only being built in the official repo; i.e the slims (and debians, alpines) would stick around (non-deprecated) for a while?

[gdams]

That’s the current plan @chadlwilson

[Crow-EH]

A bit off-topic, but would you plan to build the slim images in the official repo ?