Develop an I'm a Teapot joke easter egg

Please see:
https://save418.com/
https://tools.ietf.org/html/rfc2324
https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/418

Consider implementing it in a similar way to how the 404 Not Found page is used: https://github.com/AaronRobson/AaronRobson.github.io/blob/master/404.html

Alternatively have a `/coffee` or `/brew` page which has the details.