directory structure of wix

it doesnt matter if its for thunderbird, apple pay, automatic ssl certification or whatever. a ton of configs can be put in .well-known. so i make the question a bit easier, without all the other tools and reasons why i want to use it:

is it possible to create a router, that when i access the webpage at www.mydomain.com/.well-known/myconfig.xml, a xml is provided?
the xml can easily be fetched with javascript. i have some servers where i can upload it to and do a request. i guess i can also upload the xml to some media “store” of wix.
the question is: can the router do that.