Tried to build it locally. I ran: "docker build -t test-jenkins ."
But got such error:
The command '/bin/sh -c curl -sf -o /usr/local/bin/docker -L https://get.docker.io/builds/Linux/x86_64/docker-latest' returned a non-zero code: 22
Indeed the URL https://get.docker.io/builds/Linux/x86_64/docker-latest is wrong, browser returns 404.