Make sure you have installed the latest version of node.js and npm.
Start by cloning the repository to your local environment:
git clone https://github.com/modmore/MODX.today.git
Then navigate into the main folder of the repository and install node dependencies:
cd MODX.today
npm install
To start developing you simply need to run
npm start
This will start live-reload and start watching the files assets/tpl/sources/
.