fix network setup of ax51

hardware/hetzner_ax51-nvme/network.sh

@@ -1,6 +1,6 @@
 #!/bin/bash -e
 
-address=$(ip address show dev eth0 scope global | grep -F 'inet ' | perl -pe 's#.*inet (.*?) .*#$1#')
+address=$(ip address show dev eth0 scope global | grep -F 'inet ' | perl -pe 's#.*inet (.*?)/.*#$1#')
 gateway=$(ip route list dev eth0 default | perl -pe 's#.*via ##')
 
 # $interface differs from the live system because of different naming schemes
@@ -12,5 +12,8 @@ echo "[Match]
 Name=$interface
 
 [Network]
-Address=$address
-Gateway=$gateway" > "/etc/systemd/network/${interface}.network"
+Gateway=$gateway
+
+[Address]
+Address=${address}/32
+Peer=${gateway}/32" > "/etc/systemd/network/${interface}.network"