new tag, hopefully only on tagged-releases

Author: Jeremy Price

.github/workflows/docker.yml

@@ -33,7 +33,8 @@ jobs:
         type=raw,value=latest,enable=${{ endsWith(github.ref, github.event.repository.default_branch) }}
         type=ref,event=branch,enable=${{ !endsWith(github.ref, github.event.repository.default_branch) }}
         type=ref,event=tag
-        type=semver,pattern=v{{major}}-latest 
+        type=semver,pattern=v{{major}}-latest
+        type=pep440,pattern=v{{major}}-latest-release
       # Define default tag "flavor" for docker/metadata-action per
       # https://github.com/docker/metadata-action#flavor-input
       # We turn off 'latest' tag by default.