Yarn

Yarn Node.js package manager was an addition to manage the Bootstrap CSS framework. The impact on the tree structure is the addition of a node_modules directory in which Bootstrap itself and the related tools to build and minimize the website styles and scripts. The package.json manifest file is used by Yarn to manage the related project dependencies. An _assets directory was added to contain the script and style source files to be compiled with these tools. The result is built on the assets/{css|js} directories respectively. The node_modules and the yarn.lock file was set to be ignored by both Git and Jekyll.