How To 
Install Git 
You can find the documentation to install Git there here.
Is Git installed? 
Ensure Git is installed with the following command:
$ git --versionInstall Node.js 
Using nvm recommended 
nvm (Node Version Manager) allows you to download, install and manage your Node.js versions. With nvm you can easily switch between different versions installed on your system. You can download it with the following links:
- For GNU/Linux or macOS
 - For Windows
 
Using alternatives 
Otherwise, you can download the Node.js installer corresponding to your system here.
Is Node.js installed? 
Ensure Node.js is installed with the following command:
$ node --versionInstall Yarn 
Using yvm recommended 
yvm (Yarn Version Manager) allow you to download, install and manage your Yarn versions. With yvm you can easily switch between different versions installed on your system. You can download it with the following links:
- For GNU/Linux or macOS
 - For Windows
 
Using alternatives 
Otherwise, you can download the Yarn installer corresponding to your system here.
Is Yarn installed? 
Ensure Yarn is installed with the following command:
$ yarn --version