23:12:47[2019-09-20T23:12:47.469Z] + docker run --rm -v /home/ubuntu/workspace/moby_PR-39969:/workspace alpine sh -c apk add --no-cache -q git bash && cd /workspace && hack/validate/dco
23:12:50[2019-09-20T23:12:50.749Z] Congratulations! All commits are properly signed with the DCO!