21:54:48[2019-10-07T21:54:48.383Z] + docker run --rm -v /home/ubuntu/workspace/engine_PR-399:/workspace alpine sh -c apk add --no-cache -q git bash && cd /workspace && hack/validate/dco
21:54:54[2019-10-07T21:54:54.926Z] Congratulations! All commits are properly signed with the DCO!