anchor.diff:  ENV ANDROID_HOME /opt/android-sdk-linux
   ENV PATH ${PATH}:${ANDROID_HOME}/tools:${ANDROID_HOME}/platform-tools
   
  -ARG ANDROID_SDK_UPDATE_ADDITIONAL_PARAMS="--proxy-host 192.168.1.7 --proxy-port 7070"
  +ARG ANDROID_SDK_UPDATE_ADDITIONAL_PARAMS=
   
   RUN echo y | /opt/android-sdk-linux/tools/android update sdk --filter tools --no-ui --force -a ${ANDROID_SDK_UPDATE_ADDITIONAL_PARAMS}
   RUN echo y | /opt/android-sdk-linux/tools/android update sdk --filter platform-tools --no-ui --force -a ${ANDROID_SDK_UPDATE_ADDITIONAL_PARAMS}
  
positive.code: RUN echo 'root:123456' | chpasswd
  RUN sed -ri 's/^PermitRootLogin\s+.*/PermitRootLogin yes/' /etc/ssh/sshd_config
  RUN sed -ri 's/UsePAM yes/#UsePAM yes/g' /etc/ssh/sshd_config
  
  # copy enterpoint script
  COPY entrypoint.sh /entrypoint.sh
  
negative.code: RUN curl -sLO https://services.gradle.org/distributions/gradle-${GRADLE_VERSION}-all.zip && \
    unzip gradle-${GRADLE_VERSION}-all.zip && \
    ln -s gradle-${GRADLE_VERSION} gradle && \
    rm gradle-${GRADLE_VERSION}-all.zip 
  
  ENV GRADLE_HOME /gradle
  ENV PATH $PATH:$GRADLE_HOME/bin
  