Link to consumer in readme

Author: kasramp

README.md

@@ -18,7 +18,7 @@ $ ./mvnw spring-boot:run
 
 Open the browser `localhost:8080/apidocs`. 
 
-You can interact with the `random` api to create a random user which then will be sent to Kafka and consumed by the consumer (see `consumer/UserKafkaListener.java` file).
+You can interact with the `random` api to create a random user which then will be sent to Kafka and consumed by the consumer (see [`consumer/UserKafkaListener.java`](https://github.com/kasramp/spring-kafka-test/blob/master/src/main/java/com/madadipouya/springkafkatest/consumer/UserKafkaListener.java) file).
 
 To see whether the message has been sent to Kafka, open your browser `http://localhost:8085/topic/com.madadipouya.kafka.use` (Kafdrop environment), 
 you should be able to see all messages that sent to `kafka.user` topic.