Possible to re-use Docker tags on different versions?
You can re-use tags on different build versions. It isn't really any different than latest tag (other than latest being the default if you don't supply a tag). The main issue is to make sure you pull the actual latest version. For various reasons, your Docker client may not pick up that the remote has changed, so if want to re-use the tag and be sure you are using a specific build, you can use the sha256 hash, e.g., docker pull my/image@sha256:45b23dee08af5e43a7...
See Docker docs here.