title: Build trigger in Jenkins when a specific folder changes
body: <p>Configure Jenkins: Where it should trigger only when a particular folder changes. </p>
  
  <p>For example: 
  In a file directory: Sample/Folder/ there are 3 sub folders: F1, F2, F3. 
  The jenkins build should be triggered when F3 is changed and should not include F1, F2 in the build. These 3 folders should be independent in regards to the build but should be in the same file directory. 
  Also is there a way we can monitor the changes in the folders?</p>