[Epic] plugin-template should let plugins publish their container images, based on a pulpcore image
Ticket moved to GitHub: "pulp/pulpcore/1845":https://github.com/pulp/pulpcore/issues/1845
Currently, plugin-template builds an entire container image (from fedora:30 up) through the content plugin during CI.
It is not published.
it is also inefficient and less reproducible than being based on a "pulpcore" image.
This work was previously part of #5004 and #5062. However, most of the value for those tasks was delivered, and this work can be done afterwards. Also, it should have been separate subtasks anyway. So it is being moved into this Epic.