How to combine Codrops tutorial codes into a SilverStripe project?

I love all the tutorials and code examples on the Codrops website. Codrops Website I would like to include some of them in my SilverStripe projects. SilverStripe CMS

I've learnt how to install them to my site theme folder using NPM. The question is where is the best place to install all the dependencies like the node_modules folder. I'm breaking up the HTML code from the index.html file inside the src folder that comes with the NPM install from the tutorial and adding them to the CSS and JS folders for a SilverStripe project.

I am specifically trying to install this module: Letters Animation by Codrops

I'm trying to work this out for myself whilst still asking if anyone has direct advice for best practice for adding these modules to SilverStripe.

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