My Github Pages jekyll site.
Front matter color reference
bundle exec jekyll serve
To resize all to 700px wide:
# Convert to 700px wide
convert '*.jpg' -set filename:fn '%[basename]-small' -geometry 700x '%[filename:fn].jpg'
To create a cover.jpg:
# Crop to 393px tall and wide
convert ./cover.jpg -gravity center -crop 393x393+0+0 cropped.jpg