extend copy-pastable example in readme

README.md

@@ -8,10 +8,12 @@ Usage (from a live system):
 ./reset.sh
 reboot
 
-
 ./setup.sh <template> <fqdn>
 
 # example:
+apt-get update && apt-get -y dist-upgrade
+git clone https://gitea.lubiland.de/lubiland/hardware-setup.git
+cd hardware-setup
 ./setup.sh hetzner_ax51-nvme asef.lubi.link