DOCS - Generic 504

https://504.tgua.dev/ is a public endpoint(Also accessible at https://generic-504.pages.dev/) that serves as a generic landing page for any site, the following url params are required:
    utm_source - This is the only required param needed for generic 504, this is used to retry your site with the same url, EX: tgua.dev would try https://tgua.dev every 10 seconds for connectivity

No other parameters are needed for operation.