Upgrade Nextcloud setup to use compose files

- Integrated MariaDB role into Dockerbox configuration
- Moved proxy role to the end to avoid early endpoint activation
- Temporarily disabled select roles for future re-evaluation
- Introduced flush_handlers task for early MariaDB restart
- Moved a few Nextcloud tasks to handlers
- Configured Nextcloud to utilize the host's MariaDB instance
- Enhanced overall code linting quality

roles/mariadb/tasks/main.yml

@@ -17,6 +17,10 @@
     line: "bind-address            = {{ ansible_facts.docker0.ipv4.address }}"
   notify: restart_mariadb
 
+- name: Flush handlers to ensure MariaDB restarts immediately
+  ansible.builtin.meta: flush_handlers
+  tags: restart_mariadb
+
 - name: Allow database connections from Docker
   community.general.ufw:
     rule: allow