Update README.md

README.md

@@ -2,7 +2,13 @@ TMTC Client
 ====
 
 ## Cloning the repository
-Clone the repository with following command:
+It is recommended to fork this repository. 
+The `tmtc_core` folder contains most generic software 
+components while this repository is based on the SOURCE mission.
+However, this repostiory is a good starting point and example 
+implementation.
+
+Fork the repository or clone it with following command:
 ```sh
 git clone https://git.ksat-stuttgart.de/source/tmtc.git
 ```