title: Pass shell/bash commands to docker
body: <p>I want to be able to set up an alias to run docker, and then run <code>composer install</code>.</p>
  <p>This is my <code>sh</code> file:</p>
  <pre><code>cd ~/Documents/laradock/
  docker-compose exec --user=laradock workspace bash
  cd site
  composer install
  </code></pre>
  <p>However once it has loaded docker and entered into it: <code>docker-compose exec --user=laradock workspace bash</code> nothing happens</p>
  <p>I am expecting to see:</p>
  <pre><code>cd site
  composer install
  </code></pre>
  <p>but it doesn't pass these commands through.</p>