That doesn’t really have a meaning. Are you asking if it updates an existing Docker image, or even updates an existing Docker container (i.e. a running process)? If so, the answers would be ‘yes’ and ‘no’ respectively.

Example.

ImageA: ubuntu + apache + yourPhpApplication ImageB: ubuntu + apache

To deploy ImageA all you need to do is run the image. To deploy image B you need to run ImageB along with a copy of your application

Above I was describing ImageA.