#8257 Upgrade nodejs
Our Dockerfile and install_each_step.rst files use Node 4.x which is old and causes this warning. We should update those commands and make sure our npm things still work.
DEPRECATION WARNING
Node.js 4.x LTS Argon is no longer actively supported!
You will not receive security or critical stability updates for this version.
You should migrate to a supported version of Node.js as soon as possible.
Use the installation script that corresponds to the version of Node.js you
wish to install. e.g.
* https://deb.nodesource.com/setup_8.x — Node.js 8 LTS "Carbon" (recommended)
* https://deb.nodesource.com/setup_10.x — Node.js 10 Current
Please see https://github.com/nodejs/Release for details about which
version may be appropriate for you.
The NodeSource Node.js distributions repository contains
information both about supported versions of Node.js and supported Linux
distributions. To learn more about usage, see the repository:
https://github.com/nodesource/distributions
Fixed with [a6fb24]