change entrypoint as shown in https://gitlab.com/gitlab-org/gitlab-runner/-/issues/4027

.gitlab-ci.yml

@@ -3,7 +3,9 @@ stages:
   - deploy
 
 retrieve repo:
-  image: alpine/git
+  image:
+    name: alpine/git:latest
+    entrypoint: [""]
   stage: build
   script:
     - 'git clone https://git-r3lab.uni.lu/R3/school/courses.lcsb.uni.lu.git courses.lcsb.uni.lu'