Fix CI exclusions for schedules

.gitlab-ci.yml

@@ -97,6 +97,9 @@ backend-openapi:
   extends: .backend-setup
   stage: build
 
+  except:
+    - schedules
+
   script:
     - ci/openapi.sh
 
@@ -142,8 +145,10 @@ backend-build:
     DOCKER_DRIVER: overlay2
     DOCKER_HOST: tcp://docker:2375/
 
-  # Run this on master and tags except base tags
+  # Run this on master and tags except base tags and schedules
   rules:
+    - if: '$CI_PIPELINE_SOURCE == "schedule"'
+      when: never
     - if: '$CI_COMMIT_BRANCH == "master"'
       when: on_success
     - if: '$CI_COMMIT_TAG && $CI_COMMIT_TAG !~ /^base-.*/'
@@ -162,8 +167,10 @@ backend-build-binary:
     DOCKER_DRIVER: overlay2
     DOCKER_HOST: tcp://docker:2375/
 
-  # Run this on master and tags except base tags
+  # Run this on master and tags except base tags and schedules
   rules:
+    - if: '$CI_PIPELINE_SOURCE == "schedule"'
+      when: never
     - if: '$CI_COMMIT_BRANCH == "master"'
       when: on_success
     - if: '$CI_COMMIT_TAG && $CI_COMMIT_TAG !~ /^base-.*/'