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-nextcloud/docs/Administration.md

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+# Administration 
+
+Instructions for manual administrative operations like container login, config file edits, and post-update recovery actions.
+
+## Modify Config 🔧
+
+### Enter the Container
+```bash
+docker-compose exec -it application /bin/sh
+```
+
+### Modify the Configuration
+Inside the container, install a text editor and edit the config:
+```bash
+apk add --no-cache nano && nano config/config.php
+```
+
+## Logs
+
+The logs you will find here on the host: **/var/lib/docker/volumes/nextcloud_data/_data/data/nextcloud.log**