parameterize directories

roles/common/tasks/main.yml

@@ -5,13 +5,13 @@
     state: latest
     update_cache: yes
     cache_valid_time: 86400 # One day
-- name: Create /data directory
+- name: Create base data directory
   file:
-    path: /data
+    path: "{{ base_data_dir }}"
     state: directory
-- name: Create /srv directory
+- name: Create base service directory
   file:
-    path: /srv
+    path: "{{ base_service_dir }}"
     state: directory
 - name: Disable systemd-resolved
   systemd: