Add public status dashboard at cloud.ladkau.de

Shows live service health (green/red links) and server CPU, RAM, and
disk usage with progress bars. Reads host stats from /host/proc,
checks service endpoints every 30 s, and serves a frosted-glass UI
over a configurable background image (ansible/roles/dashboard/files/bg.jpg).

ansible/roles/dashboard/tasks/main.yml

@@ -0,0 +1,46 @@
+---
+- name: Create dashboard data directory
+  ansible.builtin.file:
+    path: "{{ dashboard_data_dir }}"
+    state: directory
+    owner: root
+    group: root
+    mode: "0755"
+  tags: dashboard
+
+- name: Deploy background image
+  ansible.builtin.copy:
+    src: bg.jpg
+    dest: "{{ dashboard_data_dir }}/bg.jpg"
+    owner: root
+    group: root
+    mode: "0644"
+  notify: Restart dashboard
+  tags: dashboard
+
+- name: Deploy dashboard app
+  ansible.builtin.template:
+    src: app.py.j2
+    dest: "{{ dashboard_data_dir }}/app.py"
+    owner: root
+    group: root
+    mode: "0644"
+  notify: Restart dashboard
+  tags: dashboard
+
+- name: Deploy Docker Compose file
+  ansible.builtin.template:
+    src: docker-compose.yml.j2
+    dest: "{{ dashboard_data_dir }}/docker-compose.yml"
+    owner: root
+    group: root
+    mode: "0644"
+  notify: Restart dashboard
+  tags: dashboard
+
+- name: Start dashboard
+  community.docker.docker_compose_v2:
+    project_src: "{{ dashboard_data_dir }}"
+    state: present
+    pull: missing
+  tags: dashboard