I am trying to reinstall my old HA system. I do NOT intend on opening any ports to the internet. Instead I will use a wireguard VPN through my Unifi Dream Machine 7. I am unclear how I can set up SSL that seems to be required for using Node Red or the mobile app. I have gotten the app to connect over the VPN but I get a number of unsecure messages every time I connect. so I guess I need to set up SSL to get things working but how? I have no domain, DNS i guess is handled by the router. I connect via IP. I hate DNS, but I know my IPs. What do I need to be setting up here?