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-listmonk/README.md

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+# Listmonk
+
+## Description
+
+Elevate your email marketing with Listmonk, a high-performance, self-hosted newsletter and mailing list manager featuring a modern, intuitive dashboard. Listmonk empowers you with advanced analytics, efficient subscriber segmentation, and streamlined campaign management—all configurable via a flexible TOML configuration file.
+
+## Overview
+
+This role deploys Listmonk using Docker, ensuring a robust and scalable setup for your newsletter management needs. Listmonk’s architecture supports a dedicated PostgreSQL database and integration with an NGINX reverse proxy for secure access. To configure and manage your instance, use the provided configuration files:
+- [Installation.md](./Installation.md)
+- [Upgrade.md](./Upgrade.md)
+
+## Features
+
+- **High Performance:** Optimized for handling large-scale mailing lists and newsletters with rapid processing.
+- **Modern Dashboard:** Enjoy a sleek, user-friendly interface for managing campaigns and analyzing performance.
+- **Advanced Analytics:** Gain insights through detailed reporting on campaign metrics and subscriber behavior.
+- **Flexible Configuration:** Easily customize settings such as database connections, admin credentials, and server configurations via a TOML file.
+- **Robust Infrastructure:** Seamlessly integrates with PostgreSQL for reliable data management and supports deployment behind a reverse proxy.
+
+## Further Resources
+
+- [Listmonk Official Website](https://listmonk.app/)
+- [Listmonk Installation Documentation](https://listmonk.app/docs/installation/)
+- [Listmonk GitHub Repository](https://github.com/knadh/listmonk/)