title: How do I find the Docker REST API URL?
body: <p>I have installed the Docker build step plugin for Jenkins.</p>
  
  <p>The documentation is telling me:</p>
  
  <pre><code>Name      : Choose a name for this Docker cloud provider
  Docker URL: The URL to use to access your Docker server API (e.g: http://172.16.42.43:4243)
  </code></pre>
  
  <p>How can I find my URL to the REST API (I have Docker installed on my host)?</p>