Fix nameserver space-separation and add systemd-networkd-wait-online fix

proxmox/01-complete-npm-vm.sh

@@ -36,12 +36,13 @@ mkdir -p ${SNIPPETS_DIR}
 cp "${SCRIPT_DIR}/snippets/npm-cloud-init.yaml" "${SNIPPETS_DIR}/npm-cloud-init.yaml"
 
 # Configure cloud-init parameters
+# NOTE: Use space-separated nameservers (not comma) to avoid netplan bug
 echo "[5/7] Configuring cloud-init..."
 qm set ${VMID} \
   --ciuser ubuntu \
   --cipassword 'mailstack2024!' \
   --ipconfig0 ip=${IP}/24,gw=${GW} \
-  --nameserver "${DNS}" \
+  --nameserver "8.8.8.8 1.1.1.1" \
   --searchdomain web.orbishosting.com \
   --cicustom "vendor=local:snippets/npm-cloud-init.yaml"