title: I thought I understood Docker until I saw the BusyBox docker image
body: <p>I thought I understood Docker. I understood it as a way to package up software with lots of dependencies..to basically create a little world where absolutely everything is taken care of for a piece of software. Then I stumbled upon this on DockerHub</p>
  
  <p><a href="https://hub.docker.com/_/busybox/" rel="noreferrer">https://hub.docker.com/_/busybox/</a></p>
  
  <p>It's an image for BusyBox, which is a tiny little Linux binary that is meant for embedded systems. Then the top comment says:</p>
  
  <blockquote>
    <p>Busybox is awesome :) By far the most useful container per byte on the entire registry.</p>
  </blockquote>
  
  <p>But I don't understand at all why this image exists, which makes me think that I don't actually understand why Docker exists. What is the point of a BusyBox docker image?</p>