docs: Add links to Docker Mailserver repository

Author: dunaj-dev

README.docker.md

@@ -1,6 +1,6 @@
 # Docker Mailserver GUI - Detailed Docker Setup
 
-This document provides detailed instructions for deploying and managing the Docker Mailserver GUI using Docker.
+This document provides detailed instructions for deploying and managing the [Docker Mailserver](https://github.com/docker-mailserver/docker-mailserver) GUI using Docker.
 
 ## Prerequisites
 

README.dockerhub.md

@@ -1,6 +1,6 @@
 # Docker Mailserver GUI
 
-A graphical user interface for managing Docker Mailserver. The application allows easy management of email accounts, aliases, and monitoring of server status.
+A graphical user interface for managing [Docker Mailserver](https://github.com/docker-mailserver/docker-mailserver). The application allows easy management of email accounts, aliases, and monitoring of server status.
 
 [![Docker Pulls](https://img.shields.io/docker/pulls/dunajdev/docker-mailserver-gui)](https://hub.docker.com/r/dunajdev/docker-mailserver-gui)
 

README.md

@@ -1,7 +1,7 @@
 # Docker Mailserver GUI
 [![Docker Pulls](https://img.shields.io/docker/pulls/dunajdev/docker-mailserver-gui)](https://hub.docker.com/r/dunajdev/docker-mailserver-gui)
 
-A graphical user interface for managing Docker Mailserver. The application allows easy management of email accounts, aliases, and monitoring of server status.
+A graphical user interface for managing [Docker Mailserver](https://github.com/docker-mailserver/docker-mailserver). The application allows easy management of email accounts, aliases, and monitoring of server status.
 
 ## Features
 

backend/README.md

@@ -1,6 +1,6 @@
 # Backend GUI for Docker Mailserver
 
-This is a backend API for the Docker Mailserver user interface, enabling management of email accounts, aliases, and other mail server functions.
+This is a backend API for the [Docker Mailserver](https://github.com/docker-mailserver/docker-mailserver) user interface, enabling management of email accounts, aliases, and other mail server functions.
 
 ## Installation
 
@@ -37,4 +37,4 @@ SETUP_SCRIPT=/path/to/docker-mailserver/setup.sh
 - `DELETE /api/accounts/:email` - Delete an account
 - `GET /api/aliases` - List of aliases
 - `POST /api/aliases` - Add a new alias
-- `DELETE /api/aliases/:source/:destination` - Delete an alias
+- `DELETE /api/aliases/:source/:destination` - Delete an alias