Use the docker-builder tools image

.gitlab-ci.yml

@@ -8,10 +8,7 @@ stages:
 
 mirror:
   stage: mirror
-  image:
-    # Use the 'debug' image as it provides a shell which is needed for GitLab CI
-    name: gcr.io/go-containerregistry/crane:debug
-    entrypoint: [""]
+  image: gitlab-registry.cern.ch/ci-tools/docker-builder/tools
   variables:
     # No need to clone the repo
     GIT_STRATEGY: none