anchor.diff:  # ---------------------------------------------------------------------- #
   LABEL maintainer "thyrlian@gmail.com"
   
  +ARG JDK_VERSION=8
   # support multiarch: i386 architecture
   # install Java
   # install essential tools
  
positive.code: RUN dpkg --add-architecture i386 && \
      apt-get update && \
      apt-get install -y --no-install-recommends libncurses5:i386 libc6:i386 libstdc++6:i386 lib32gcc1 lib32ncurses6 lib32z1 zlib1g:i386 && \
      apt-get install -y --no-install-recommends openjdk-8-jdk && \
      apt-get install -y --no-install-recommends git wget unzip && \
      apt-get install -y --no-install-recommends qt5-default
  
  
negative.code:     rm *tools*linux*.zip
  
  # set the environment variables
  ENV JAVA_HOME /usr/lib/jvm/java-${JDK_VERSION}-openjdk-amd64
  ENV GRADLE_HOME /opt/gradle
  ENV KOTLIN_HOME /opt/kotlinc
  ENV PATH ${PATH}:${GRADLE_HOME}/bin:${KOTLIN_HOME}/bin:${ANDROID_SDK_ROOT}/cmdline-tools/tools/bin:${ANDROID_SDK_ROOT}/platform-tools:${ANDROID_SDK_ROOT}/emulator
  