gnupgが必要らしい
error
d - && curl -sL https://deb.nodesource.com/setup_9.x | bash - && apt-get update && apt-get install -y nodejs
---> Running in 6c9ae273f351
E: gnupg, gnupg2 and gnupg1 do not seem to be installed, but one of them is required for this operation
Dockerfileに以下を追記
Dokerfile
RUN apt-get update \
&& apt-get install -my wget gnupg