canjs.com is hosted on GitHub pages from the canjs/canjs#gh-pages branch. To generate and push a new version of the website, verify you have push access to that branch. Then get all latest changes via:

git checkout master
git fetch --all && git rebase
npm cache clean
rm -rf node_modules

We also have to delete the local gh-pages branch:

git branch -D gh-pages

Then run

make

This will generate and publish a new version of the website.