Pagination

[Edvinas01]

Currently the returned number of images is fixed. The following is needed:

• Pagination is required to the image API. A new endpoint may be introduced and the old one can be kept.
• Items returned by this API should be sorted from newest to oldest.
• When a user scrolls all the way down and reaches the page limit, the next page of images should be loaded and displayed in the UI using this new API.