Workflow updates

.gitlab-ci.yml

 workflow:
   rules:
-    - if: '$CI_COMMIT_BRANCH == "staging" || $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH'
+    - if: >-
+        $CI_COMMIT_BRANCH == "staging"
+        || ($CI_COMMIT_BRANCH == "main" && $CI_COMMIT_TITLE =~ /Merge branch 'staging' into 'main'/)
       when: always
     - when: never
 
@@ -123,6 +125,7 @@ create-release-tag:
   allow_failure: true
 
 deploy-new-staging-version:
+  extends: .gke-initialization
   stage: deploy
   needs:
     - 'build-image'