Image optimization tools

The package will use these optimizers if they are present on your system:

Here's how to install all the optimizers on Ubuntu:

sudo apt-get install jpegoptim optipng pngquant gifsicle

And here's how to install the binaries on MacOS (using Homebrew):

brew install jpegoptim optipng pngquant gifsicle

Image manupulation tools

apt-get install --no-install-recommends libvips42 # install libvips without nip2