21:47:58[2019-08-28T21:47:58.292Z] + docker run --rm -v /home/jenkins/workspace/engine_PR-338:/workspace alpine sh -c apk add --no-cache -q git bash && cd /workspace && hack/validate/dco
21:48:13[2019-08-28T21:48:13.508Z] Congratulations! All commits are properly signed with the DCO!