How to use --init parameter in docker run : <p>There are <code>--init</code> and <code>--init-path</code> options for <code>docker run</code>, but it's not clear how to use it.</p>

<p>At first, I thought it's something like <a href="https://github.com/Yelp/dumb-init" rel="noreferrer">dumb-init</a>, but included in docker core (kind of "native"). But <code>--init</code> key demands <code>--init-path</code> to be set as well, pointing to 'docker-init binary', and gives no clue on where to take it. Google is silent about 'docker-init'.</p>

<p>Okay, maybe I'm supposed to use 'yelp/dumb-init' or 'phusion/baseimage-docker', but those solutions don't seem to use <code>docker run</code>'s <code>--init</code> option.</p>

<p>So, I'm curious where do I take this "docker-init binary" to set the <code>--init-path</code> to?</p>
