title: Docker, Jenkins and Rails - Setup for running specs on a typical Rails stack
body: <p>I would like a Jenkins master and slave setup for running specs on standard Rails apps (PostgreSQL, sidekiq/redis, RSPec, capybara-webkit, a common Rails stack), using docker so it can be put on other machines as well. I got a few good stationary machines collecting dust.</p>
  
  <ol>
  <li><p>Can anybody share an executable docker jenkins rails stack example?</p></li>
  <li><p>What prevents that from being done?</p></li>
  </ol>
  
  <p>Preferable with master-slave setup too.</p>
  
  <p>Preface:
  After days online, following several tutorials with no success, I am about to abandon project. I got a basic understanding of docker, docker-machine, docker compose and volumes, I got a docker registry of a few simple apps.</p>