boilerplate for three.js is a template to get you started. You download it and modify it until it fits your needs. It is a fast way to start a clean project with three.js. It avoids repetitive tasks, following DRY principles. It includes various good practices and compatibilities features. More details here.
git clone https://github.com/jeromeetienne/threejsboilerplate.git
And start updating index.html until it fits yours need.