✨ Add new role web-app-confluence

Introduced a new Ansible role for deploying Atlassian Confluence within the Infinito.Nexus ecosystem.
The role follows the same structure as web-app-pretix and includes:

- : Core variables, database config, OIDC integration.
- : Docker service definitions, features (Matomo, CSS, OIDC, logout, central DB).
- : Loads docker, db and proxy stack.
- : Placeholder for schema definitions.
- :
  -  (base for OIDC plugins/extensions),
  -  (service orchestration),
  -  (environment configuration).
- : Metadata, license, company, logo (Font Awesome book-open icon).

Canonical domain is set to `confluence.{{ PRIMARY_DOMAIN }}`.
This role ensures Confluence integrates seamlessly with Keycloak OIDC and the Infinito.Nexus service stack.

Conversation: https://chatgpt.com/share/68b1d006-bbd4-800f-9d2e-9c8a8af2c00f

roles/web-app-confluence/templates/docker-compose.yml.j2

@@ -0,0 +1,25 @@
+{% include 'roles/docker-compose/templates/base.yml.j2' %}
+  application:
+    build:
+      context: .
+      dockerfile: Dockerfile
+      args:
+        CONFLUENCE_BASE_IMAGE: "{{ CONFLUENCE_IMAGE }}:{{ CONFLUENCE_VERSION }}"
+    image: "{{ CONFLUENCE_IMAGE }}:{{ CONFLUENCE_VERSION }}-oidc"
+    container_name: "{{ CONFLUENCE_CONTAINER }}"
+    hostname: '{{ CONFLUENCE_HOSTNAME}}'
+    ports:
+      - "127.0.0.1:{{ ports.localhost.http[application_id] }}:8090"
+    volumes:
+      - 'data:/var/atlassian/application-data/confluence'
+{% include 'roles/docker-container/templates/healthcheck/curl.yml.j2' %}
+{% include 'roles/docker-container/templates/base.yml.j2' %}
+    depends_on:
+      - database
+{% include 'roles/docker-container/templates/networks.yml.j2' %}
+
+{% include 'roles/docker-compose/templates/volumes.yml.j2' %}
+  data:
+    name: {{ CONFLUENCE_DATA_VOLUME }}
+
+{% include 'roles/docker-compose/templates/networks.yml.j2' %}