Merge branch 'doc_update' into 'master'

.gitlab-ci.yml

README.md

docs/docs/CollaborationContext.md

docs/docs/CollaborationIntegration.md

docs/docs/PolicyService-Integration.md

docs/docs/api.md

docs/docs/index.md

docs/docs/ingestion.md

docs/docs/running.md

docs/mkdocs.yml

publish.yml