title: Maintaining a Git repo inside another git repo
body: <p>I have a git repo which contains an AngularJS web app. </p>
  
  <p>It has a subfolder called <code>build</code>, which gets created by a gulp task. I am deploying to Azure, so it is connected directly to my bitbucket directory.   </p>
  
  <p>I want to make build folder as a separate git repo from which the Azure app is being deployed. How do I achieve this in git??</p>