I didn't find the repo for the website (I even checked for the gh-pages branches), but if I had found it I would have opened a PR to fix http://www.pibakery.org/contribute.html where there is a 200px Octocat but using an 800px image. One can actually watch it draw in as it loads. That's not only suboptimal for your mobile users, but also a pet peeve of mine. :-)

This svg Octocat is 7kb and CC-Attribution-3.0, but it's only the first one I found: https://commons.wikimedia.org/wiki/File:PEO-octocat-1.svg

Thanks so much for the hard work on PiBakery, it seems great!