title: How to generate a Dockerfile from an image?
body: <p>Is it possible to generate a Dockerfile from an image?  I want to know for two reasons:</p>
  
  <ol>
  <li><p>I can download images from the repository but would like to see the recipe that generated them.</p></li>
  <li><p>I like the idea of saving snapshots, but once I am done it would be nice to have a structured format to review what was done.</p></li>
  </ol>