feat: add incoming fw rules, fixed routes and improved docs

handlers/main.yaml

@@ -7,12 +7,10 @@
     state: "restarted"
 
 # apply local routes
-- name: "apply routes"
+- name: "apply routes - add static routes"
   ansible.builtin.shell:
     cmd: |
       {% for route in static_routes %}
-      ip route replace {{ route.destination }} via {{ route.gateway }}
-      {% if route.interface is defined %}dev {{ route.interface }}{% endif %}
+      ip route replace {{ route.destination }} via {{ route.gateway }}{{ ' dev ' + route.interface if route.interface is defined else '' }}{{ ' metric ' + route.metric if route.metric is defined else '' }}
       {% endfor %}
   when: "static_routes | length > 0"
-  changed_when: false