#414 Link submodule readmes

README.md

@@ -17,12 +17,20 @@ To run all tests, run: `mvn test`
 
 ### External Configuration
 
-Configuration properties e.g. for REST-API urls and proxy settings can be found in the HOCON config ``sdk.conf`` within
-the root folder of the project.
+Configuration properties e.g. for REST-API urls and proxy settings can be found in
+the [HOCON](https://github.com/lightbend/config/blob/main/HOCON.md)
+config ``sdk.conf`` within the root folder of the project.
 
 ### Documentation
 
-https://docs.fitko.de/fit-connect/docs/
+See the projects module documentation for more specific information:
+
+* [API Module ](api/README.md)
+* [Core Module ](core/README.md)
+* [Client Module ](client/README.md)
+* [Dependency Module ](dependency/README.md)
+
+As well as the official API docs: [Fit-Connect Documentation](https://docs.fitko.de/fit-connect/docs/)
 
 ### Self Service Portal (DEV)