[Website] SEO optimalization

[Baklap4]

Suggestion

Currently the website is not findable on the web. We should make a best effort to get higher into the rankings of google, preferably beating every other documentation site/blogpost out there

What would help is if we can claim an ultrastar domain like ultrastar.org but it seems this is already reserved :(

Use case

If people search for Ultrastar specification or other Ultrastar txt related things we'd want to pop up as one of the first results.
This way people will use the spec more than other listed sources out there which in the end results into a better spread of the specification.

Extra info/examples/attachments

Some documentation about seo: https://developers.google.com/search/docs/fundamentals/seo-starter-guide

[Baklap4]

usdx.eu/format is still not found within google. Maybe we need to link from the main page since it under usdx.eu? @basisbit

[basisbit]

there is no need for yet another domain. Just properly embed links to it in the main usdx page at https://github.com/UltraStar-Deluxe/ultrastar-deluxe.github.io