static_websites: Adjust directory permissions

This patch reduces the permissions on the install directory to just the root user and also fixes the ansible-lint issue by specifying the `mode`.

roles/static_websites/tasks/main.yml

@@ -21,6 +21,9 @@
   file:
     path: "{{ item }}"
     state: directory
+    mode: '0700'
+    owner: 'root'
+    group: 'root'
   with_items:
     - "{{ static_websites_install_location }}"
   become: true