Persist docker-login artifact throughout pipeline process

.gitlab-ci.yml

@@ -18,6 +18,8 @@ build-job:
 publish-job:
   stage: publish
   image: docker:stable
+  dependencies:
+    - build-job
   tags:
     - docker
   script:
@@ -27,6 +29,8 @@ deploy-job:
   stage: deploy
   when: manual
   image: google/cloud-sdk
+  dependencies:
+    - build-job
   script:
     - export KUBECONFIG="$KUBE_AUTH"
     - cp "$ENV_PRODUCTION" "./build/.env.production"