title: Submitting a jar to sequenceiq docker-spark container
body: <p>so I never worked with Spark or Docker, but I have to use it for a project.
  I'm trying to understand how this works. So I build a fat jar in Eclipse and was hoping to submit it to my docker container, which I set up using this guide: <a href="https://github.com/sequenceiq/docker-spark" rel="nofollow noreferrer">https://github.com/sequenceiq/docker-spark</a></p>
  
  <p>Now, I don't really understand how I get my jar from my local system to my docker container and then run it.</p>
  
  <p>I think I'm missing how this all really works together, but maybe someone can clear it up.</p>
  
  <p>I would be very thankful!</p>