Remove Exif data from source images:

exiftool -all= *.jpg *.JPG

Create gallery:

thumbsup --input ./src/ --output ./gallery --title Gallery \
         --albums-output-folder a --albums-from "%path" \
         --cleanup true --photo-quality 80 --sort-media-by filename \
         --sort-albums-by title --theme-path ./theme-classic/theme/

see https://thumbsup.github.io/docs/