Hi Ofuuzo,
To be clear, you can upload *any* file type to Dataverse. I think you know this already but I'm repeating it for others so there's no confusion. :)
In addition to tabular files, there are more file types that receive special processing at
http://guides.dataverse.org/en/4.2.1/user/dataset-management.html"The file types listed below are supported by additional functionality,
which can include downloading in different formats, subsets, file-level
metadata preservation, file-level data citation; and exploration
through data visualization and analysis."
It goes on to say "Image files: jpgs, pngs, and tiff files are able to be selected as the
default thumbnail for a dataset. The selected thumbnail will appear on
the search result card for that dataset."