how to create the app's icon
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https://www.flaticon.com/free-icon/glass-with-wine_33529#term=wine&page=1&position=59
get this image, color=black, at each of these sizes: 16,32,64,128,256

from this answer: https://stackoverflow.com/a/16922387
install image magick. in the install process, check legacy support (necessary for "convert")
go to the install dir: C:\Program Files\ImageMagick...
run the convert method from the stackoverflow example
run cmd
drag/drop convert.exe into cmd
...