Ensure build retagging hits the cache

Author: danschmidt5189

.github/workflows/build.yml

@@ -3,9 +3,12 @@ name: Build / Test / Push
 on:
   push:
     branches:
-      - '*'
+      - '**'
   workflow_dispatch:
 
+env:
+  DOCKER_METADATA_SET_OUTPUT_ENV: 'true'
+
 jobs:
   build:
     runs-on: ubuntu-latest
@@ -78,6 +81,8 @@ jobs:
     needs:
       - build
       - test
+    env:
+      DOCKER_APP_IMAGE: ${{ needs.build.outputs.build-image }}
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
@@ -100,9 +105,7 @@ jobs:
             type=raw,value=latest,enable={{is_default_branch}}
 
       - name: Retag and push the image
-        uses: docker/build-push-action@v6
-        with:
-          cache-from: type=registry,ref=${{ needs.build.outputs.build-image }}
-          labels: ${{ steps.branch-meta.outputs.labels }}
-          push: true
-          tags: ${{ steps.branch-meta.outputs.tags }}
+        run: |
+          docker pull "$DOCKER_APP_IMAGE"
+          echo "$DOCKER_METADATA_OUTPUT_TAGS" | tr ' ' '\n' | xargs -n1 docker tag "$DOCKER_APP_IMAGE"
+          docker push --all-tags "$(echo "$DOCKER_APP_IMAGE" | cut -f1 -d:)"