Add a static site for capative portals
It'd be nice if we hosted a TXT file somewhere with some recognisable string (e.g. "OK" or SUCCESS") like Fedora does. This site can be used with software like NetworkManager to check whether a connection requires login (like most public WiFis do). This address is queried upon connecting to a network (to check if an immediate login is required) and then every so often (to check if the network requires you to log in again after some amount of time has passed) and is basically just a check if the site can be reached and outputs the desired result or if the user is redirected to some login page.
There have been some privacy concerns about this since the hoster of the website could collect the IPs that query the website, e.g. to count users. As such it'd make sense if we host this site since we're a trusted party already - users already query our servers to update repos etc.