Skip CUDA install if no NVIDIA GPU

Dockerfile

@@ -28,7 +28,10 @@ ENV LC_ALL=en_US.UTF-8 \
 
 # Install all OS dependencies for notebook server that starts but lacks all
 # features (e.g., download as all possible file formats)
-RUN apt-get update --yes && \
+RUN \
+    apt-get update --yes && \
+    apt-get install --yes --no-install-recommends pciutils && \
+    _CUDA_=$(lspci -nn | grep '\[03' | grep NVIDIA) && \
     apt-get install --yes --no-install-recommends \
     #fonts-liberation, pandoc, run-one are inherited from base-notebook container image
     # Other "our" apt installs
@@ -45,7 +48,7 @@ RUN apt-get update --yes && \
     emacs \
     # CUDA
     #cuda \
-    nvidia-cuda-toolkit \
+    $([ -n "$_CUDA_" ] && echo nvidia-cuda-toolkit) \
     && \
     apt-get clean && rm -rf /var/lib/apt/lists/* && \
     echo "en_US.UTF-8 UTF-8" > /etc/locale.gen && \