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-joomla/vars/configuration.yml

@@ -0,0 +1,14 @@
+images:
+  joomla:             "joomla:latest"
+features:
+  matomo:             true
+  css:                true
+  portfolio_iframe:   true
+  central_database:   true
+domains:
+  canonical:
+    - "cms.{{ primary_domain }}"
+docker:
+  services:
+    database:
+      enabled: true

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

@@ -0,0 +1,3 @@
+application_id:     "joomla"
+database_password:  "{{joomla_database_password}}"
+database_type:      "postgres"