[WIP] Use own registry to pull the mirrored image

Author: thlehmann-ionos

.github/workflows/sbom.yaml

@@ -135,7 +135,10 @@ jobs:
 
     # https://docs.github.com/en/actions/writing-workflows/choosing-where-your-workflow-runs/running-jobs-in-a-container
     container:
-      image: cyclonedx/cyclonedx-cli:0.27.1
+      image: ${{ vars.HARBOR_URL_PREFIX }}/cyclonedx-cli:0.27.1
+      credentials:
+        username: ${{ secrets.HARBOR_USERNAME }}
+        password: ${{ secrets.HARBOR_PASSWORD }}
 
     steps:
       - name: Download partial BOMs