Allow substituting TLD based on connecting instance

[mohkale]

Hi there,

I have my media server setup in 2 configuration modes. One for localhost and one for public. For localhost I have all my services under a dedicated subdomain, so heimdall.localhost and sonarr.localhost for example. For the public config I have them on a dedicated domain like sonarr.foo.com. Is there a way I can setup heimdall such that it substitutes the destination domain based on the domain I'm reaching to it with? So if I connect through heimdall.foo.com all the applications I've listed will target foo.com instead of localhost? Ideally I'd like to avoid duplicating configurations between my local and public instances.