refactor(docu): reference config yaml in client docu

client/README.md

@@ -6,7 +6,7 @@ The sdk comes with a commandline client to be able to use the sdk without any co
 #### Setup & Build
 1. Build project root wih ``./mvnw clean package``
 2. Go to client/target and find a runnable jar ``client-VERSION.jar``
-3. Provide config either via env-var or by loading it programmatically:
+3. Provide [config yaml](../config.yml) either via env-var or by loading it programmatically:
    1. set environment variable ``FIT_CONNECT_CONFIG``:
       1. Linux/MacOS: ``export FIT_CONNECT_CONFIG=path/to/config.yml``
       2. Windows: ``set FIT_CONNECT_CONFIG=C:\Path\To\config.yml``