Can't build: GPG sig in image outdated for nvidia gpu

[jecompton]

I cloned the repo, cd'ed into football, and ran docker build --build-arg DOCKER_BASE=tensorflow/tensorflow:1.15.2-gpu-py3 . -t gfootball. However, I got this error:

W: GPG error: https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64  InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A4B469963BF863CC
E: The repository 'https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64  InRelease' is no longer signed.
The command '/bin/bash -c apt-get update && apt-get --no-install-recommends install -yq git cmake build-essential   libgl1-mesa-dev libsdl2-dev   libsdl2-image-dev libsdl2-ttf-dev libsdl2-gfx-dev libboost-all-dev   libdirectfb-dev libst-dev mesa-utils xvfb x11vnc   python3-pip' returned a non-zero code: 100

What should I do?