Track the nginx-menu playbook as it stands

It has been serving three menu Sites from an untracked directory, so today's
state was not reproducible or revertible.

nginx-menu/playbook.yml

@@ -0,0 +1,10 @@
+---
+- hosts: all
+  become: true
+  vars_files:
+    - vars/default.yml
+
+  roles:
+    - network
+    - nginx
+    - caddy