title: Install Jenkins plugins using Docker image
body: <p>Say we use a Docker image to run Jenkins with a container.
  Is there a way to install plugins in the image so we don't have to re-install if we create a new Jenkins server?</p>
  
  <p>Something like:</p>
  
  <pre><code>FROM jenkins/jenkins:lts
  RUN install jenkins-plugin-a
  RUN install jenkins-plugin-b
  </code></pre>
  
  <p>etc</p>