Fix netplan on container restart

ansible/router/main/base.yaml

@@ -10,6 +10,11 @@
   vars_files:
     - "vars/base.yaml"
   tasks:
+    - name: Ensure netplan is applied at boot
+      ansible.builtin.cron:
+        name: "netplan update"
+        special_time: reboot
+        job: "/usr/sbin/netplan apply"
     - name: Setup bgp
       tags: ["bgp"]
       import_tasks: tasks/bgp.yaml