This is the source of my current portfolio site...unless I forgot to reuse this repo when I build a new one, in which case this is probably the source for an older version.
Grunt CLI needs to be installed along with NodeJS.
npm install -g grunt-cli
from there it's just installing the dependancies...
npm install
and either running the server.
grunt server
or building the site for deploy (build is the default grunt task)
grunt build or just grunt
In addition to building the handlebars templates Grunt will: compile the Sass, copy static dependancies into the dist folder, and run autoprefixer on the resulting CSS and Sass map. It's a self contained process!
Easy-peasy.