Update .gitlab-ci.yml

.gitlab-ci.yml

@@ -11,7 +11,7 @@ build:
     DOCKER_DRIVER: overlay2
   script:
     - docker login -u "gitlab-ci-token" -p ${CI_JOB_TOKEN} ${CI_REGISTRY}
-    - docker build -t ${CI_REGISTRY_IMAGE} .
+    - docker build -t ${CI_REGISTRY_IMAGE}/prod:${CI_PIPELINE_ID} .
     - docker push ${CI_REGISTRY_IMAGE}
   environment:
     name: ${CI_COMMIT_REF_NAME}