content: FROM ubuntu:16.04@sha256:1f1a2d56de1d604801a9671f301190704c25d604a416f59e03c04f5c6ffee0d6
  
  RUN apt-get update && \
      apt-get install -y \
      apt-transport-https \
      ca-certificates \
      curl \
      git \
      build-essential software-properties-common \
      gnupg \
      libicu-dev
  
  # Install newer clang
  RUN apt-add-repository "deb http://apt.llvm.org/xenial/ llvm-toolchain-xenial-5.0 main" && \
      apt-get update && \
      apt-get install -y --allow-unauthenticated clang-5.0 && \
      update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-5.0 1000 && \
      update-alternatives --install /usr/bin/clang clang /usr/bin/clang-5.0 1000 && \
      update-alternatives --config clang && \
      update-alternatives --config clang++
  
  # Install newer g++
  RUN add-apt-repository ppa:ubuntu-toolchain-r/test -y && \
      apt-get update && \
      apt-get install -y g++-9 && \
      update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-9 60 --slave /usr/bin/g++ g++ /usr/bin/g++-9
  
  # Install newer cmake, based on https://apt.kitware.com/
  RUN wget -O - https://apt.kitware.com/keys/kitware-archive-latest.asc 2>/dev/null | gpg --dearmor - | tee /etc/apt/trusted.gpg.d/kitware.gpg >/dev/null && \
      echo 'deb [signed-by=/usr/share/keyrings/kitware-archive-keyring.gpg] https://apt.kitware.com/ubuntu/ xenial main' | tee /etc/apt/sources.list.d/kitware.list >/dev/null && \
      apt-get update && \
      apt-get install -y --allow-unauthenticated cmake
  
  COPY ./scripts/dotnet-install.sh ./dotnet-install.sh
  
  RUN chmod +x ./dotnet-install.sh \
      && ./dotnet-install.sh -v 9.0.305 --install-dir /usr/share/dotnet --no-path \
      && rm dotnet-install.sh
  
  WORKDIR /project
  