Look into html templating/embedding

[Mirko-von-Leipzig]

⚠ This is very low priority, capturing solely so we don't forget about this.

Originally mentioned in #647

Static files

Low priority, but we could consider a better html solution. Especially if we want to add more in the future as a configuration/admin dashboard.

There are some interesting developments with htmx and crates like maud and askama for embedding html.

Currently we only have the faucet's webpage, which is a single html+js+css served separately (aka index.html fetches index.css and index.js). Something else to consider is replacing the javascript file with htmx which is all the rage at the moment.

This should only really be considered IFF we fiddle with the faucet webpage, and/or introduce more webpages for other purposes.