fix(terraform): Adjust boot template to produce functioning DNS

Currently the resolv.conf was deleted but not properly replaced. This
patch adjust that and makes sure things are put in the right place.

terraform/templates/cloud-init.tpl

@@ -29,15 +29,16 @@ sysctl --system
 
 dnf install -y iptables
 
+# Disable systemd-resolved for CoreDNS
+rm -f /etc/resolv.conf
+cp /run/systemd/resolve/resolv.conf /etc/resolv.conf
+systemctl disable --now systemd-resolved
+
 # Prepare NetworkManager for Calico
 cat <<EOF | sudo tee /etc/NetworkManager/conf.d/calico.conf
 [keyfile]
 unmanaged-devices=interface-name:cali*;interface-name:tunl*;interface-name:vxlan.calico;interface-name:wireguard.cali
 EOF
-
-# Disable systemd-resolved for CoreDNS
-systemctl disable --now systemd-resolved
-rm -f /etc/resolv.conf
 systemctl restart NetworkManager
 
 reboot