title: Where do I set environment variables on my Django Digital Ocean server?
body: <p>I'm running my Django project on my Ubuntu 16.04 Digital Ocean server running Gunicorn/Nginx. I have my whole project except my <code>settings.py</code> file so am looking do add that in now - however don't want to hardcode the <code>SECRET_KEY</code> - so am looking to define an environment variable like it says in the Django docs: <code>SECRET_KEY = os.environ['SECRET_KEY']</code>. </p>
  
  <p>Where do I define this variable? Is it in my gunicorn config file (<code>/etc/systemd/system/gunicorn.service</code>)</p>