title: Are changes to Docker images automatically transferred to deployed containers?
body: <p>As I understand, there is a Docker Server hosting images (containers) of the apps. Then I can deploy these images to whatever infrastructure I want, be it locally or cloud. Am I right?</p>
  
  <p>Assume this diagram </p>
  
  <p><a href="https://i.stack.imgur.com/kz8PW.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/kz8PW.png" alt="http://i64.tinypic.com/ldsvd.png"></a></p>
  
  <p>If I modify the apps, is it enough to just modify them in the Docker Server, and then the changes will be transferred (automatically?) to the deployed containers? Or do I need to modify each instance?</p>