I wouldn't recommend to host on the same raspberry pi your lighning node and a website open to everyone. Umbrel is quite convinient for bitcoin/lightning node, nextcloud, immich and other apps provided by umbrel, so only you can access your data using Tailscale VPN. But for hosting a website there are esier ways than using umbrel. You can have a separate RPi with an apache server, just for your website. But maybe it is easier to use github pages, as some other people recommends.