14:17:49[2019-09-30T14:17:49.069Z] + docker run --rm -v /home/ubuntu/workspace/moby_PR-39992:/workspace alpine sh -c apk add --no-cache -q git bash && cd /workspace && hack/validate/dco
14:17:52[2019-09-30T14:17:52.342Z] Congratulations! All commits are properly signed with the DCO!