FROM jenkins
USER root

RUN bash -c "if ! [ -e /usr/lib/apt/methods/https ]; then apt-get update && apt-get install -y apt-transport-https; fi"

RUN \
  apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 36A1D7869245C8950F966E92D8576A8BA88D21E9 && \
  sh -c "echo deb https://get.docker.io/ubuntu docker main > /etc/apt/sources.list.d/docker.list" && \
  apt-get update && apt-get install -y lxc-docker && \
  rm /etc/apt/sources.list.d/docker.list

USER jenkins