Huge role refactoring/cleanup. Other commits will propably follow. Because some bugs will exist. Still important for longrun and also for auto docs/help/slideshow generation

roles/web-app-mailu/vars/main.yml

@@ -0,0 +1,14 @@
+application_id:           "mailu"
+
+# Database Configuration
+database_password:        "{{applications.mailu.credentials.database_password}}"
+database_type:            "mariadb"
+
+cert_mount_directory:     "{{docker_compose.directories.volumes}}certs/"
+
+# Use dedicated source for oidc if activated  
+# @see https://github.com/heviat/Mailu-OIDC/tree/2024.06
+docker_source:            "{{ 'ghcr.io/heviat' if applications | is_feature_enabled('oidc',application_id) else 'ghcr.io/mailu' }}"
+
+domain:                   "{{ domains | get_domain(application_id) }}"
+http_port:                "{{ ports.localhost.http[application_id] }}"