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-discourse/Administration.md

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+# Administration Notes
+
+## Check configuration
+
+```bash
+./launcher enter application
+pry(main)> SiteSetting.all.each { |setting| puts "#{setting.name}: #{setting.value}" }
+```
+---
+
+## Reinitialize Container
+
+To reinitialize the container execute:
+
+```bash
+docker network connect discourse_default central-postgres && /opt/docker/discourse/services/discourse_repository/launcher rebuild discourse_application
+```
+
+### 🔍 Logging with `journalctl`
+
+All build actions triggered by this role are logged to the system journal using `systemd-cat`. Output is simultaneously shown in the terminal and available via `journalctl`.
+
+To view logs for a specific application:
+
+```bash
+journalctl -t rebuild-discourse -f
+```