Docker-node: Properly handle signals from kernel

[retrohacker]

When running Node.js inside of a Docker container, the process doesn't properly handle signals from the kernel. This manifests itself as containers refusing to shutdown when issued SIGTERM (CTRL+C).

A pattern I've started using for Node containers is to wrap the executable in Yelp's dumb-init

Thoughts on either including this in the documentation or shipping this to the base image?

[yosifkit]

With docker 1.13 you can use --init on docker run to get tini automatically injected for you as PID 1. :smile:

[chorrell]

I'm more in favour of having something in the documentation either about the docker 1.13 feature or other options

[retrohacker]

Woah, the --init flag is pretty amazing, didn't know this existed!

:+1: on this being documentation.