Before you start using this static site generator you need to make sure that you have installed all required software tools.
You can use a Node installer to install both Node.js and npm on your system.
Open up your terminal.
$ node --version
$ npm --version
The output of each of those commands should be a version number. If entering those commands doesn’t show you a version number, go back and make sure you have installed Node.js.
You will need ssg in your machine, you can clone or download it using this link.
Open up your terminal and cd into your folder.
$ npm install
You will find documentation here.