First category is taken as 'category', the rest are taken as 'tags'
Categories with more than 3 posts are advanced to channels
master is deployed to Heroku
gh-pages is deployed to Github Pages. With .nojekyll which means only the static, generated files must be pushed to Github not the source
- add content to master, copy generated _site to gh-pages
- on gh-pages urls & style must be updated manually or via a script