Sends a request to cloudflare once jekyll has finished building your sire to clear the cache there.
Add the following to your site's Gemfile
gem 'jekyll-cloudflare-cache-purge'
Define two env vars on the system that builds and hosts your blog:
CLOUDFLARE_ZONE="<Get this value from your CF dashboard>"
CLOUDFLARE_API_TOKEN="<Create an api key just for purging the cache in CF>"
Once your blog has built, you should see a line appear in the build output that
reads Cloudflare Cache: Purged