Add alpha to tag if not publishing latest

Author: jdolle

.github/workflows/build-and-dockerize.yaml

@@ -292,21 +292,22 @@ jobs:
           done
 
       - name:
-          'publish docker multiarch manifest (tag: ${{ inputs.imageTag }}-${{
-          steps.git_hash.outputs.sha_short }})'
+          'publish docker multiarch manifest (tag: ${{ inputs.imageTag }}-${{ inputs.publishLatest
+          && "" || "alpha-" }}${{ steps.git_hash.outputs.sha_short }})'
         env:
           TARGETS: ${{ inputs.targets }}
           REGISTRY: ${{ inputs.registry }}
           IMAGE_NAME: ${{ inputs.imageName }}
           IMAGE_TAG: ${{ inputs.imageTag }}
           SHA_SHORT: ${{ steps.git_hash.outputs.sha_short }}
+          RELEASE_STAGE: ${{ inputs.publishLatest && '' || 'alpha-' }}
         run: |
           targets=$(docker buildx bake -f docker/docker.hcl --print "$TARGETS" | jq -r '.group."'"$TARGETS"'".targets[]')
 
           for target in $targets
           do
               echo "publishing multi-arch manifest for $target"
-              image_name="$REGISTRY/$IMAGE_NAME/$target:${IMAGE_TAG}-${SHA_SHORT}"
+              image_name="$REGISTRY/$IMAGE_NAME/$target:${IMAGE_TAG}-${RELEASE_STAGE}${SHA_SHORT}"
               base_image="$REGISTRY/$IMAGE_NAME/$target:${IMAGE_TAG}"
               echo "image name: $image_name"