feat(ansible): add semaphore docker splash demo with dagster config

ansible-semaphore-docker-demo/undeploy.yml

@@ -0,0 +1,29 @@
+---
+- name: Undeploy demo container
+  hosts: webservers
+  become: yes
+
+  vars_files:
+    - group_vars/all.yml
+
+  tasks:
+    - name: Rimuovi container demo
+      community.docker.docker_container:
+        name: "{{ container_name }}"
+        state: absent
+
+    - name: Rimuovi immagine (opzionale)
+      community.docker.docker_image:
+        name: "{{ nginx_image }}"
+        tag: "{{ nginx_version }}"
+        state: absent
+      when: remove_image | bool
+
+    - name: Rimuovi directory applicazione
+      ansible.builtin.file:
+        path: /opt/semaphore-splash
+        state: absent
+
+    - name: Conferma undeploy
+      ansible.builtin.debug:
+        msg: "Container {{ container_name }} rimosso con successo"