Implemented vars, tasks and templates for central database setup until mastodon role

roles/docker-joomla/tasks/main.yml

@@ -1,15 +1,18 @@
 ---
+- name: include docker vars
+  include_vars: vars/docker-database-service.yml.j2
+
+- name: create central database
+  include_role:
+    name: docker-{{database_type}}
+  when: enable_central_database | bool
+
 - name: "include tasks nginx-docker-proxy-domain.yml"
   include_tasks: nginx-docker-proxy-domain.yml
   loop: "{{ domains }}"
   loop_control:
     loop_var: domain
 
-- name: create database in central MariaDB
-  include_role:
-    name: docker-mariadb
-  when: enable_central_database | bool
-
 - name: "create {{docker_compose_instance_directory}}"
   file:
     path: "{{docker_compose_instance_directory}}"