Automatic build on base image change only updates latest tag

[albuch]

@djenriquez I've noticed that the automatic build that you've set up for #184 is only tagging with 'latest'.
Is there a possibility to get the latest stable version tag (e.g. currently 2.3.0) to be build and republished as well?
Users probably don't want to switch to the 'latest' tag in production deployments but currently have to to get security fixes for the base image.

[djenriquez]

Hey @albuch, completely understand. I don't see an obvious way to do that through docker hub. I'll dig around and see what I can do.