Documentation for https://tunalog.org, (GitHub Repo)
$ pngquant -f --ext .png screenshot*.png
$ convert screenshot-1_dark.png -resize 50% screenshot-1_dark.png &&
convert screenshot-2_dark.png -resize 50% screenshot-2_dark.png &&
convert screenshot-3_dark.png -resize 50% screenshot-3_dark.png &&
convert screenshot-4_dark.png -resize 50% screenshot-4_dark.png &&
convert screenshot-5_dark.png -resize 50% screenshot-5_dark.png &&
convert screenshot-6_dark.png -resize 50% screenshot-6_dark.png &&
convert screenshot-7_dark.png -resize 50% screenshot-7_dark.png &&
convert screenshot-1_light.png -resize 50% screenshot-1_light.png &&
convert screenshot-2_light.png -resize 50% screenshot-2_light.png &&
convert screenshot-3_light.png -resize 50% screenshot-3_light.png &&
convert screenshot-4_light.png -resize 50% screenshot-4_light.png &&
convert screenshot-5_light.png -resize 50% screenshot-5_light.png &&
convert screenshot-6_light.png -resize 50% screenshot-6_light.png