Merge pull request #364 from OpenMS/ci/fix-lowercase-cache-ref

ci: lowercase image name for OCI cache refs

Author: t0mdavid-m

.github/workflows/build-and-test.yml

@@ -55,6 +55,9 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
+      - name: Compute lowercase image name (OCI refs must be lowercase)
+        run: echo "IMAGE_NAME_LC=${IMAGE_NAME,,}" >> "$GITHUB_ENV"
+
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
@@ -88,8 +91,8 @@ jobs:
             ${{ steps.meta.outputs.tags }}
             openms-streamlit:${{ matrix.variant }}-test
           labels: ${{ steps.meta.outputs.labels }}
-          cache-from: type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}/cache:${{ matrix.variant }}
-          cache-to: ${{ github.event_name != 'pull_request' && format('type=registry,ref={0}/{1}/cache:{2},mode=max', env.REGISTRY, env.IMAGE_NAME, matrix.variant) || '' }}
+          cache-from: type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME_LC }}/cache:${{ matrix.variant }}
+          cache-to: ${{ github.event_name != 'pull_request' && format('type=registry,ref={0}/{1}/cache:{2},mode=max', env.REGISTRY, env.IMAGE_NAME_LC, matrix.variant) || '' }}
           build-args: |
             GITHUB_TOKEN=${{ secrets.GITHUB_TOKEN }}