message: Stage improvements.
diff: @@ -3,13 +3,10 @@ FROM mcr.microsoft.com/dotnet/sdk:5.0-focal
  RUN apt update \
  && apt install -y \
  gnupg \
  - dirmngr
  -
  -RUN curl -fsSL https://cli.github.com/packages/githubcli-archive-keyring.gpg | gpg --dearmor -o /usr/share/keyrings/githubcli-archive-keyring.gpg
  -
  -RUN echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/githubcli-archive-keyring.gpg] https://cli.github.com/packages stable main" | tee /etc/apt/sources.list.d/github-cli.list > /dev/null
  -
  -RUN apt update \
  + dirmngr \
  + && curl -fsSL https://cli.github.com/packages/githubcli-archive-keyring.gpg | gpg --dearmor -o /usr/share/keyrings/githubcli-archive-keyring.gpg \
  + && echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/githubcli-archive-keyring.gpg] https://cli.github.com/packages stable main" | tee /etc/apt/sources.list.d/github-cli.list > /dev/null \
  + && apt update \
  && apt install -y \
  clang \
  cmake \
  