More helpful output in db_migrations_updated

.gitlab-ci.yml

@@ -16,7 +16,7 @@ db_migrations_updated:
   stage: test
   script:
   - FLASK_APP=uffd flask db upgrade
-  - FLASK_APP=uffd flask db migrate
+  - FLASK_APP=uffd flask db migrate 2>&1 | tee /dev/stderr | grep -q 'No changes in schema detected'
 
 linter:
   stage: test