Most developers tools are written as gulp scripts. You may run the gulp scripts with the help of yarn or npm:
yarn gulp [command]
or
npm run gulp -- [command]
You may use the help command for available tasks.
We will use yarn tool in all examples here.
To build all the HTML and assets (JS, images), you can run this command:
yarn gulp build
This will build the website in the public folder.
To start a development server that host the above files:
yarn gulp server
This will start a web server on localhost:8080.