Add artifacts

gitlabci/docker-hub.yml

@@ -1,6 +1,9 @@
 docker-hub-build:
   stage: Docker-hub-build
   image: docker:dind
+  artifacts:
+    expire_in: 2 days
+
   timeout: 3 hours 30 minutes
   before_script:
     - docker login -u "$DOCKER_HUB_USER" -p "$DOCKER_HUB_TOKEN" $DOCKER_HUB_REGISTRY