Fix Gitlab-CI

.gitlab-ci.yml

+image: gricad-registry.univ-grenoble-alpes.fr/kubernetes-alpes/buildah:latest
+
 stages:
   - build
 
+variables:
+  REGISTRY_LOGIN: buildah login -u gitlab-ci-token -p $CI_REGISTRY_PASSWORD
+  REGISTRY_LOGOUT: buildah logout
+  IMAGE_BUILD: buildah build-using-dockerfile --storage-driver vfs --format docker
+  IMAGE_PUSH: buildah push --storage-driver vfs
+
+before_script:
+- $REGISTRY_LOGIN $CI_REGISTRY
+
+after_script:
+- $REGISTRY_LOGOUT $CI_REGISTRY
+
 build:
   stage: build
-  image: gricad-registry.univ-grenoble-alpes.fr/kubernetes-alpes/buildah:latest
-  tags:
-    - dind
   variables:
-    REGISTRY_LOGIN: buildah login -u gitlab-ci-token -p $CI_REGISTRY_PASSWORD
-    REGISTRY_LOGOUT: buildah logout
-    IMAGE_BUILD: buildah build-using-dockerfile --storage-driver vfs --format docker
-    IMAGE_PUSH: buildah push --storage-driver vfs
     DOCKERFILE: Dockerfile
     IMAGE_NAME: $CI_REGISTRY_IMAGE/ws-timeseries:$CI_COMMIT_SHORT_SHA
   script:
-    - $REGISTRY_LOGIN $CI_REGISTRY
     - echo $CI_COMMIT_SHORT_SHA > ./static/commit.txt
     - $IMAGE_BUILD --file $DOCKERFILE $BUILD_ARG --tag $IMAGE_NAME .
     - $IMAGE_PUSH  $IMAGE_NAME $IMAGE_NAME
-    - $REGISTRY_LOGOUT $CI_REGISTRY
-
-
-