Ghost doesn't make it easy for you to migrate ghost installations if you don't have access to the underlying server (e.g. your ghost is a docker installation hosted on a service that doesn't allow you to access its container instance, like Zeit Co's Now)
in content/images
content/images files as a .zip file (albeit in a very under-documented fashion) (ref)[https://docs.ghost.org/api/migration/#importing-images]content/images filesi can't think of a non-cynical answer to this so i prefer not to comment.
src="/content/images/size/w2000/2019/06/Screen-Shot-2019-06-17-at-17.04.44.png", then your image file should sit in content/images/2019/06/Screen-Shot-2019-06-17-at-17.04.44.png
/content/images/2019/06/Screen-Shot-2019-06-19-at-17.10.05.png)
content folder and import the .zip file using Ghost's labs > import function..zip in order to upload onto the new Ghost instance.WORK IN PROGRESS
content folder