@viperfx this is a problem that I’ve wondered a while about, and no clue what the best way to solve. I don’t think its Redwood specific, because its definitely an infrastructure problem (TLS isn’t something applications deal with!).
I have a “hacky” way of doing it, running your website through cloudflare and their SSL proxy, and detecting the subdomain using the hook. This is how I run one of my home servers (not redwood related, whatsoever).
I would love to hear how you solved it.