message: add DEBIAN_FRONTEND=noninteractive
diff: @@ -20,6 +20,7 @@ RUN apt-get update && \
  ENV PATH=$PATH:/opt/mfem-view/bin
  ENV LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/opt/mfem-view/lib:/opt/mfem-view/lib64
  +ENV DEBIAN_FRONTEND=noninteractive
  # The user will see the view on shell into the container
  WORKDIR /opt/mfem-view
  