Raspberry Pi / Fritzbox subdomain forwarding?

I have a few things running on the Pi that are currently accessible like this: raspberrypi:PORT/… This is a bit annoying because you have to remember everything and the browser's autocomplete doesn't help. I would like to have: website1.raspberrypi -> raspberrypi:8000, nodered.raspberrypi -> raspberrypi:1880, ui.raspberrypi -> raspberrypi:1880/ui etc. Even shorter would also be strong, for…

Can you run a network without a dedicated router if you have a DHCP and DNS server and a modem?

I've been playing around with various DNS servers over the last few days, including Adguard Home, and I noticed that it also offers the option of setting up a DHCP server, which means that as far as I know, my FritzBox wouldn't do anything anymore, since I use an external modem (from Telekom) for my…