deb-src repository broken / no source artifacts

Hey,

it seems that the deb-src repository, added by calling

curl -sL https://deb.nodesource.com/setup_10.x | bash -,

doesn't contain source artifacts / is broken. After a successful nodejs installation with the command above I tried to call apt-get source nodejs and got the error E: You must put some 'source' URIs in your sources.list

I need the source code of the package to do a node-gyp rebuild in environments which don't have internet access.

The bug occurs on ubuntu bionic. I didn't test other versions yet.

I wrote a Dockerfile which demonstrates the issue:

FROM ubuntu:bionic
RUN apt-get update && \
    apt-get -y install curl && \
    curl -sL https://deb.nodesource.com/setup_10.x | bash - && \
    apt-get install -y nodejs && \
    apt-get update && \
    echo "grepping for deb-src without # to ensure that it's activated" && \
    grep -E ^deb-src /etc/apt/sources.list.d/nodesource.list && \
    apt-get update && \
    apt-get source nodejs

You can just call docker build on that to reproduce the error.