Add instruction for XDC Standby (#2360)

service/worker/README.md

@@ -22,19 +22,24 @@ Quickstart for localhost development
 
 1. Setup Kafka by following instructions:
 [Kafka Quickstart](https://kafka.apache.org/quickstart)
-2. Create Kafka topic for active cluster:
+2. Create Kafka topic for active and standby clusters if needed. By default the development Kafka should create topics in- flight (with 1 partition). If not, then use the follow command to create topics:
 ```
 bin/kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic active
 ```
-3. Create Kafka topic for standby cluster:
+and 
 ```
 bin/kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic standby
 ```
-4. Start Cadence development server for active zone:
+3. Start Cadence development server for active zone:
 ```
 ./cadence-server --zone active start
 ```
 
+4. Start Cadence development server for standby(passive) zone:
+```
+./cadence-server --zone standby start
+```
+
 
 Cadence cluster is now running with the replicator consuming messages from
 Kafka topic standby.