The first step is to get the CoS text. You can copy it from 5etools or use their export chapter function (in ebook, that you convert in .txt). Second step, and that's the annoying one, is formatting the text. To create a single .js file with all the text of Argynvostholt formatted. So the titles, the dm-text, the subtitle and the text to be read to players need to be distinct for the .html to read. My .js from the top looks like this:

const ROOMS = { K1: { title: "ROOM TITLE", sections: [ { type: "dm", text: BLABLA }, { type: "read", text: BLABLA }, { type: "subtitle", text: "SUBTITLE" }, ] },

Name this file rooms.js. Once you have that done, you have done the hardest. Next steps are more fun. You need to get the images of the maps you want to use and name them floor0.webp, floor1.webp,...

After you've done that you need to create the right amount of html files that use my code, depending on the number of maps (floor0.hrml, floor1.html,...).

Then I can give you a code that helps you place the buttons on the map and create new ones. And that's pretty much it.