[AFP-53] 📝 Add readme instructions to test kafka producer and consumer [@svalencia]

backend/order-management/README.md

@@ -58,3 +58,24 @@ Example Console Response:
 2021-05-05 17:13:29.932  INFO 82715 --- [ntainer#0-0-C-1] c.afp.ordermanagement.service.Consumer   : #### -> Consumed message -> somethinghere
 ```
 
+
+## Testing Kafka Producer and Consumer
+Make sure kafka server and zookeeper are running
+To create a kafka topic:
+kafka-topics.sh --describe --topic <insert-topic-here> --bootstrap-server localhost:9092
+if the above command doesn't work, try:
+/usr/local/Cellar/kafka/2.8.0/bin/kafka-topics  --describe --topic orders --bootstrap-server localhost:9092
+
+To start kafka console for producer:
+kafka-console-producer.sh --topic orders --bootstrap-server localhost:9092
+-OR-
+/usr/local/Cellar/kafka/2.8.0/bin/kafka-console-producer --topic orders --bootstrap-server localhost:9092
+
+To start kafka console for consumer:
+kafka-console-consumer.sh --topic orders --from-beginning --bootstrap-server localhost:9092
+-OR-
+/usr/local/Cellar/kafka/2.8.0/bin/kafka-console-consumer --topic orders --from-beginning --bootstrap-server localhost:9092  (--from-beginning flag will show all messages that were received for this particular topic)
+
+if you're still getting errors finding the pathway for kafka, try running:
+ls -alrth /usr/local/Cellar/kafka/    
+then find your way to the bin directory where you'll find all the kafka commands
\ No newline at end of file