title: proc_open(): fork failed - Out of memory
body: <p>I'm running the following command in composer</p>
  
  <p><code>composer create-project pyrocms/pyrocms website</code></p>
  
  <p>which is leading to an error </p>
  
  <blockquote>
    <p>The archive may contain identical file names with different capitalization (which fails on case insensitive filesystems) Unzip with unzip command failed, falling back to ZipArchive class</p>
  </blockquote>
  
  <p>and the subject error as well. I'm not sure which is causing which. But I'm kind of lost as to how to fix it as I'm running in a Docker environment with the following</p>
  
  <ul>
  <li>unlimited resources</li>
  <li>memory_limit = -1</li>
  <li>timeout limit > 2000</li>
  </ul>
  
  <p>I'm running in a Docker Linux armv7 envirnoment using composer 1.7.3. </p>