Zuulv3: Add project-config to check pipeline
This allows Zuulv3 to report configuration errors back to gerrit.
Publish job to upload artifacts to tarballs.openstack.org
post-run: playbooks/publish/openstack-tarball
+- project:
+ name: openstack-infra/project-config
+ check:
+ jobs: []
+
- project:
name: openstack-infra/zuul-jobs
check:
