22:47:20[2019-10-17T22:47:20.119Z] + docker run --rm -v /home/ubuntu/workspace/moby_PR-39964:/workspace alpine sh -c apk add --no-cache -q git bash && cd /workspace && hack/validate/dco
22:47:23[2019-10-17T22:47:23.397Z] Congratulations! All commits are properly signed with the DCO!