##1. Install Yarn
###macOS
####Homebrew
You can install Yarn through the Homebrew package manager. This will also install Node.js if it is not already installed.
brew install yarn
If you use nvm or similar, you should exclude installing Node.js so that nvm’s version of Node.js is used.
brew install yarn --without-node
####MacPorts
You can install Yarn through MacPorts. This will also install Node.js if it is not already installed.
sudo port install yarn
###Debian / Ubuntu
https://yarnpkg.com/lang/en/docs/install/#debian-stable
###Windows https://yarnpkg.com/lang/en/docs/install/#windows-stable
##2. Go to the theme's folder
yarn install
##3. Compile all assets
grunt build
##4. Start watching all assets (for development)
./node_modules/grunt/bin/grunt watch