Ciao! I don’t have a tutorial yet, but it’s on my list — actually, this question is a good motivation to write one! 😄 The short version: HAProxy on Orange Pi Zero 3 (Armbian), Certbot for SSL, reverse proxy to Raspberry Pi 4B behind NAT. The trickiest part is the ACL rules for multiple subdomains and the certificate renewal hook. I’ll write a proper post about it on lake8.dev — I’ll mention it here when it’s ready.