FROM ruby:2.4

WORKDIR /home/qa

RUN wget -q https://npm.taobao.org/mirrors/moby/Linux/x86_64/docker-1.12.1.tgz && \
    tar -zxf docker-1.12.1.tgz && mv docker/docker /usr/local/bin/docker && \
    echo "0c6b9b39a87a82794f7165ce85860bacd7454171cd034f913b95e60f542716f0  /usr/local/bin/docker" | sha256sum -c - && \
    rm docker-1.12.1.tgz