title: Building an app using gradle with jenkins in docker
body: <p>I want to build my project with gradle.<br/>
  To achieve this I have a  docker file with installation details of Gradle and Java and I am trying to run it as a Jenkins job.<br/>
  I have the docker file in the root of my project and I have configured Jenkins to pull code from git.<br/>
  I have installed Jenkins in docker too..</p>
  
  <p>But I am not sure hot to run the docker file as a Jenkins Job and then run Gradle as a Jenkins Job.</p>