Update .gitlab-ci.yml file

.gitlab-ci.yml

@@ -47,3 +47,9 @@ deploy-job:      # This job runs in the deploy stage.
   script:
     - echo "Deploying application..."
     - echo "Application successfully deployed."
+    prod:
+    stage: prod
+    when: manual
+    allow_failure: false
+    script:
+      - echo 'prod'