Update .gitlab-ci.yml

.gitlab-ci.yml

@@ -6,6 +6,13 @@
   - chmod 700 ~/.ssh
   - echo "$UBERSPACE_KNOWN_HOST" >> ~/.ssh/known_hosts
 
+workflow:
+  rules:
+    - if: '$CI_PIPELINE_SOURCE == "merge_request_event"'
+    - if: '$CI_COMMIT_BRANCH && $CI_OPEN_MERGE_REQUESTS'
+      when: never
+    - if: '$CI_COMMIT_BRANCH'
+
 stages:
   - build
   - upload