optimize-images.sh

# install dependecies
brew install imagemagick jpegoptim pngquant

# download images
mkdir images
cd images
wget https://example.com/test_image_01.jpg
wget https://example.com/test_image_02.jpg
wget https://example.com/test_image_03.jpg
wget https://example.com/test_image_01.png
wget https://example.com/test_image_02.png
wget https://example.com/test_image_03.png

# resize (1024x1024 - maximum size of image)
mogrify -resize 1024x1024\> *

# jpeg (85 - quality)
jpegoptim -m85 *.jpg

# png (32 - number of colors)
pngquant 32 *.png