ci: slim down scheduled pipelines

.gitlab-ci.yml

@@ -40,6 +40,15 @@ build:
   artifacts:
     paths:
       - www
+  except:
+    - schedules
+
+scheduled-build:
+  stage: build
+  script:
+    - npm run build
+  only:
+    - schedules
 
 lint:
   stage: build
@@ -144,6 +153,8 @@ pages:
     - mv docs public
   only:
     - master
+  except:
+    - schedules
   artifacts:
     paths:
       - public
@@ -188,7 +199,9 @@ staging:
     name: staging
     url: https://$CI_PROJECT_PATH_SLUG-staging.surge.sh/
   only:
-  - develop
+    - develop
+  except:
+    - schedules
   tags:
     - secrecy
 
@@ -202,6 +215,8 @@ production_demo:
     name: production
     url: https://$CI_PROJECT_PATH_SLUG.surge.sh/
   only:
-  - master
+    - master
+  except:
+    - schedules
   tags:
     - secrecy