ci: ne compile l'image docker qu'en cas de changement ou si forcé

.gitlab-ci.yml

@@ -23,10 +23,12 @@ docker:
   - docker build -t ${IMAGE_NAME}:latest -f Dockerfile-base .
   - docker push ${IMAGE_NAME}:latest
   image: docker:20.10.17
-  allow_failure: true
-  only:
-    changes:
-      - Dockerfile-base
+  rules:
+    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH
+      changes:
+        paths:
+        - Dockerfile-base
+    - if: $COMPILE_DOCKER
 
 test_ppparis:
   stage: test