add tailscale to backup role

roles/backup/tasks/system_setup/configure_tailscale.yml

@@ -0,0 +1,21 @@
+---
+- include_vars: "headscale.yml"
+  ignore_errors: True
+
+- name: backup | tailscale | ensure tailscale is enabled and running
+  tags: tailscale,system,system setup
+  service:
+    name: tailscaled
+    state: started
+    enabled: true
+
+- name: backup | tailscale | connect to headscale
+  tags: tailscale,system,system setup
+  command: "tailscale up --login-server {{ headscale_url }} --authkey {{ headscale_authkey }}"
+  args:
+    creates: /var/lib/tailscale/tailscaled.state
+  when:
+    - headscale_url is defined
+    - headscale_authkey is defined
+  changed_when: true
+  notify: restart tailscaled