Fix nvidia docker key (#255)

* Fix nvidia key

* Test if it actually fails

* Undo

* Don't delete prior key

Author: ad-daniel

Diff for: Dockerfile-cuda

@@ -2,6 +2,10 @@ FROM nvidia/cuda:11.2.0-cudnn8-devel-ubuntu20.04
 
 ARG branch
 
+# Fix NVIDIA CUDA Linux repository key rotation
+ENV APT_KEY_DONT_WARN_ON_DANGEROUS_USAGE=1
+RUN apt-key adv --fetch-keys https://developer.download.nvidia.com/compute/cuda/repos/ubuntu$(cat /etc/os-release | grep VERSION_ID | awk '{print substr($0,13,5)}' | awk -F'.' '{print $1$2}')/x86_64/3bf863cc.pub
+
 # Install dependencies
 RUN apt-get update && \
     apt-get --yes install git sudo apt-utils