gif-frames package should be used in front end

[TaniaPash]

Actual

gif-frames is used in node process

png file is saved into annotated directory

export.folders.<folder-name>.thumbnail is the png file

A specific image is used as thumbnail

Expected

gif-frames is used in teh browser (frontend)

png file is not saved anywhere but regenerated in the browser

export.folders.<folder-name>.thumbnail is the gif file

The first image of the gif is used as a thumbnail