在docker container中运行自动化测试，需要在container里安装chromedriver和chrome浏览器，还有headless display的xvfb。由于测试是用java写的，gradle运行的，所以还需要安装java和gradle，Dockerfile如下：
FROM java:8
ADD . /test
WORKDIR /test
# Download and install Gradle
RUN \
cd /usr/local && \
curl -L https://services.gradle.org/distributions/gradle-4.1-bin.zip -o gradle-4.1-bin.zip && \
unzip gradle-4.1-bin.zip && \
rm gradle-4.1-bin.zip
RUN apt-get update
# Install chrome
RUN apt-get -y install fonts-liberation xdg-utils libxss1 libappindicator1 libindicator7 libgtk-3-0 lsb-release
RUN wget https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb
RUN apt-get -f install -y
RUN dpkg -i google-chrome*.deb
# Install chromedriver
RUN wget-N https://chromedriver.storage.googleapis.com/LATEST_RELEASE-P ~/Downloads
RUN wget-N"http://chromedriver.storage.googleapis.com/`cat ~/Downloads/LATEST_RELEASE`/chromedriver_linux64.zip" -P ~/Downloads
RUN chmod +x ~/Downloads/chromedriver
RUN mv -f ~/Downloads/chromedriver /usr/local/share/chromedriver
RUN ln -s /usr/local/share/chromedriver /usr/local/bin/chromedriver
RUN ln -s /usr/local/share/chromedriver /usr/bin/chromedriver
#Install Headless Display
RUN apt-get -y install xvfb
# Export some environment variables
ENV GRADLE_HOME=/usr/local/gradle-4.1
ENV PATH=$PATH:$GRADLE_HOME/bin
EXPOSE {some port}
CMD "running script for test"
