Add TL;DR section to README with setup instructions

Added a TL;DR section with setup instructions for CAT and logging QSOs.

Author: int2001

README.md

@@ -2,6 +2,12 @@
 
 A modern Electron-based gateway application that connects WSJT-X, FLRig, Hamlib, and other amateur radio software to WaveLog for seamless logging and radio control.
 
+# TL;DR:
+- For CAT you'll need [FLRig](https://www.w1hkj.org/files/flrig/) or [Hamlib](https://github.com/Hamlib/Hamlib/wiki/Download) installed and connected to your Transceiver.
+- For logging QSOs from WSJT-X, you need to configure the so called "Secondary UDP Server" like shown in the picture:
+<img width="788" height="312" alt="image" src="https://github.com/user-attachments/assets/a4d005d0-8546-4ae3-99e8-89a195df9e0e" />
+
+
 ## Features
 
 ### Core Functionality
@@ -242,4 +248,4 @@ This project is licensed under the terms specified in the [LICENSE](LICENSE) fil
 
 - **Issues**: Report via [GitHub Issues](https://github.com/wavelog/WaveLogGate/issues)
 - **Documentation**: See additional README files in the repository for specific features
-- **WaveLog**: [WaveLog Website](https://wavelog.org/) for logging system support
+- **WaveLog**: [WaveLog Website](https://wavelog.org/) for logging system support