anchor.diff:      rm -rf /tmp/* /var/tmp/*
   
   # Install Android SDK
  -RUN echo "Installing sdk tools ${ANDROID_SDK_TOOLS_VERSION}" && \
  +RUN echo "sdk tools ${ANDROID_SDK_TOOLS_VERSION}" && \
       wget --quiet --output-document=sdk-tools.zip \
           "https://dl.google.com/android/repository/sdk-tools-linux-${ANDROID_SDK_TOOLS_VERSION}.zip" && \
       mkdir --parents "$ANDROID_HOME" && \
       unzip -q sdk-tools.zip -d "$ANDROID_HOME" && \
       rm --force sdk-tools.zip
   
  -RUN echo "Installing ndk ${ANDROID_NDK_VERSION}" && \
  +RUN echo "ndk ${ANDROID_NDK_VERSION}" && \
       wget --quiet --output-document=android-ndk.zip \
       "http://dl.google.com/android/repository/android-ndk-${ANDROID_NDK_VERSION}-linux-x86_64.zip" && \
       mkdir --parents "$ANDROID_NDK_HOME" && \
  
positive.code:         wget \
          zip \
          zlib1g-dev > /dev/null && \
      echo "Installing nodejs, npm, cordova, ionic, react-native" && \
      curl -sL -k https://deb.nodesource.com/setup_${NODE_VERSION} \
          | bash - > /dev/null && \
      apt-get install -qq nodejs > /dev/null && \
  
negative.code:         "platforms;android-17" \
          "platforms;android-16" > /dev/null
  
  RUN echo "platform tools" && \
      yes | "$ANDROID_HOME"/tools/bin/sdkmanager \
          "platform-tools" > /dev/null
  
  RUN echo "build tools 24-30" && \
      yes | "$ANDROID_HOME"/tools/bin/sdkmanager \
          "build-tools;30.0.0" \
          "build-tools;29.0.3" "build-tools;29.0.2" \
  