anchor.diff:      apt-utils \
       ca-certificates
   
  -# Enforce https-only Ubuntu apt repositories 
  +# Enforce https-only Ubuntu apt repositories
   # RUN sed -i 's|http://archive.ubuntu.com/ubuntu|https://mirrors.kernel.org/ubuntu|g' /etc/apt/sources.list
   
   # Install support for managing locales
  
positive.code: FROM ubuntu:focal
  
  ARG DEBIAN_FRONTEND noninteractive
  
  # Use specific Java version
  ARG JAVA_VERSION 11.0.11.hs-adpt
  
negative.code: RUN bash -c 'source ${SDKMAN_DIR}/bin/sdkman-init.sh && sdk install java ${JAVA_VERSION}'
  
  # Configure R Java home
  RUN bash -c 'source ${SDKMAN_DIR}/bin/sdkman-init.sh && R CMD javareconf'
  
  # Cleanup
  RUN apt-get -y clean
  