**NOTE:** in this mode all changes to html and data files will be automatically regenerated, but after changing ```_config.yml``` you have to restart server.
**Note:** You need to install [Node.js](http://nodejs.org/download/)
To watch changes of `.sass` files and compile it to the `.css` on a fly change property `safe: true` to `safe: false` in `_config.yml`.
**Note: It works only on local machine, because GitHub runs Jekyll in `--save` [mode](https://help.github.com/articles/using-jekyll-with-pages/#configuration-overrides)**
Learn more about Sass development from [documentation](https://github.com/gdg-x/zeppelin/wiki/Sass-development).
You can optimize images and minify css and javascript automatically (for now only on Windows).
But for Mac OS users available amazing tool - [imageoptim](https://imageoptim.com/). Thanks [@raphaelsavina](https://github.com/raphaelsavina) for link.
Optimize all images by running this script from `/automation/images/` folder: