Before moving ahead, it can be useful to explain why we just did so much hard work with a dynamic module packer/bundler such as Webpack instead of dropping a bunch of links pointing to all the relevant JS files--either hosted locally or, even better, through a high-performance CDN--right from the beginning.
To keep it simple, we did that because it's the only way to efficiently handle any modern JavaScript modular system such as Angular, RxJS, and also all applications based upon them, including the one we're working on right now.
What's a modular system exactly? It's nothing more than a package, library, or application split into a series of smaller files depending on each other using reference statements ...