changed skopeo caching

.gitea/workflows/build.yml

@@ -104,25 +104,31 @@ jobs:
           tags: ${{ steps.metadata.outputs.tags }}
           labels: ${{ steps.metadata.outputs.labels }}
 
-      - name: Push Image via Skopeo (Convert to OCI via Archive)
+      - name: Push Image via Skopeo (Optimized Archive)
         if: github.event_name != 'pull_request'
         env:
           GENERATED_TAGS: ${{ steps.metadata.outputs.tags }}
         run: |
-          for tag in $GENERATED_TAGS; do
-            echo "Saving $tag to temporary tarball..."
-            docker save "$tag" -o image.tar
+          # Die mehrzeiligen Tags in ein Bash-Array umwandeln
+          TAG_LIST=($GENERATED_TAGS)
+          FIRST_TAG=${TAG_LIST[0]}
 
+          echo "Saving image ONCE via $FIRST_TAG to temporary tarball..."
+          docker save "$FIRST_TAG" -o image.tar
+
+          # Jetzt loopen wir NUR den Upload-Schritt über dieselbe Datei
+          for tag in "${TAG_LIST[@]}"; do
             echo "Pushing and converting $tag to clean OCI format..."
             skopeo copy \
               --format oci \
               --dest-creds "${{ github.repository_owner }}:${{ secrets.REGISTRY }}" \
               docker-archive:image.tar \
               docker://$tag
-
-            rm -f image.tar
           done
 
+          # Am Ende sauber aufräumen
+          rm -f image.tar
+
       - name: Install envsubst dependencies
         if: github.event_name != 'pull_request'
         run: |