ci: fix cache ref

Author: foosel

.github/workflows/build.yml

@@ -12,7 +12,8 @@ concurrency:
   group: ${{ github.workflow }}
 
 env:
-  REGISTRY_NAME: ghcr.io/octoprint/custopizer
+  REGISTRY_NAME: ghcr.io
+  IMAGE_NAME: octoprint/custopizer
 
 jobs:
   build:
@@ -45,7 +46,7 @@ jobs:
       id: meta
       uses: docker/metadata-action@v5
       with:
-        images: ${{ env.REGISTRY_NAME }}
+        images: ${{ env.REGISTRY_NAME }}/${{ env.IMAGE_NAME }}
 
     - name: "🐳 Set up Docker Buildx"
       uses: docker/setup-buildx-action@v3
@@ -61,11 +62,11 @@ jobs:
         labels: ${{ steps.meta.outputs.labels }}
 
         # inline cache
-        cache-from: type=registry,ref=${{ steps.meta.outputs.tags[0] }}
+        cache-from: type=registry,ref=${{ env.IMAGE_NAME }}:${{ steps.meta.outputs.tags[0] }}
         cache-to: type=inline
 
         # export
-        outputs: type=image,"name=${{ env.REGISTRY_NAME }}",push-by-digest=true,name-canonical=true,push=true
+        outputs: type=image,"name=${{ env.REGISTRY_NAME }}/${{ env.IMAGE_NAME }}",push-by-digest=true,name-canonical=true,push=true
 
 
   test:
@@ -76,7 +77,7 @@ jobs:
     steps:
       - name: "🐳 Load image into Docker"
         run:
-          IMAGE="$REGISTRY_IMAGE@sha256:${{ needs.build.outputs.digest }}"
+          IMAGE="${{ env.REGISTRY_NAME }}/${{ env.IMAGE_NAME }}@sha256:${{ needs.build.outputs.digest }}"
           docker pull "$IMAGE"
           docker image ls -a
 
@@ -115,7 +116,7 @@ jobs:
 
       - name: "📦️ Tag image in registry"
         run: |
-          IMAGE="$REGISTRY_IMAGE@sha256:${{ needs.build.outputs.digest }}"
+          IMAGE="${{ env.REGISTRY_NAME }}/${{ env.IMAGE_NAME }}@sha256:${{ needs.build.outputs.digest }}"
           TAGS=$(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON")
 
           docker buildx imagetools create $TAGS $IMAGE