Two things:

1. Upload the files — copy this repo's build/, web/ and pdf310.min.js over the contents of ..._ShopByDrawing/pdf/ on the server.
2. Change two URLs in the page template — the existing script tags that point at pdf/build/pdf.min.js and pdf/web/viewer.min.js become pdf/build/pdf.mjs and pdf/web/viewer.mjs.

Then bust the static cache. That's the whole deploy.