updated documentation

Author: ck-c8y

mqtt-mapping-ui/mqtt-mapping/README.md

@@ -21,3 +21,7 @@ The mapper processes messages in both directions:
 <img src="../../resources/image/Generic_MQTT_AddMapping.png"  style="width: 70%;" />
 </p>
 <br/>
+
+For the complete documentation please check the github projekt [cumulocity-dynamic-mqtt-mapper](https://github.com/SoftwareAG/cumulocity-dynamic-mqtt-mapper).
+
+**NOTE:** This solution requires an additional microservice. The microservice ```mqtt-mapping-service.zip``` can be found in the [release section](https://github.com/SoftwareAG/cumulocity-dynamic-mqtt-mapper/releases) of the github project. Instruction how to the deploy the microservice can be found in the [documentation](https://github.com/SoftwareAG/cumulocity-dynamic-mqtt-mapper#microservice).