title: How to compress a directory in Elixir?
body: <p>I know how to open up a zip file in write mode in Elixir:</p>
  
  <p><code>file = File.open("myzip.zip", [:write, :compressed])</code></p>
  
  <p>but after this, say if I have a directory <code>/home/lowks/big_files</code>, how do I write this into <code>file</code> ?</p>