Define app data dir in variable

ansible/roles/scrutiny/files/docker-compose.yml

@@ -6,7 +6,7 @@ services:
     ports:
       - "{{ wireguard.clients[ansible_fqdn].ip }}:7278:8080"
     volumes:
-      - /mnt/tank/app-data/scrutiny/:/config
+      - "{{ app_data_dir }}/scrutiny/:/config"
     environment:
       - SCRUTINY_WEB=true
       - PUID={{ docker_user.id }}
@@ -19,7 +19,7 @@ services:
     volumes:
       - /dev/disk:/dev/disk
       - /run/udev:/run/udev:ro
-      - /mnt/tank/app-data/scrutiny/:/config
+      - "{{ app_data_dir }}/scrutiny/:/config"
     environment:
       - SCRUTINY_COLLECTOR=true
       - SCRUTINY_API_ENDPOINT=http://web:8080