Update README.md

Author: louie-tsai

ChatQnA/README.md

@@ -90,6 +90,13 @@ cd GenAIExamples/ChatQnA/docker_compose/intel/cpu/xeon/
 # cd GenAIExamples/ChatQnA/docker_compose/nvidia/gpu/
 docker compose up -d
 ```
+To enable Open Telemetry Tracing, compose_telemetry.yaml file need to be merged along with default compose.yaml file.   
+CPU example with Open Telemetry feature:  
+
+```bash
+cd GenAIExamples/ChatQnA/docker_compose/intel/cpu/xeon/
+docker compose -f compose.yaml -f compose_telemetry.yaml up -d
+```
 
 It will automatically download the docker image on `docker hub`:
 
@@ -232,6 +239,12 @@ cd GenAIExamples/ChatQnA/docker_compose/intel/hpu/gaudi/
 docker compose up -d
 ```
 
+To enable Open Telemetry Tracing, compose_telemetry.yaml file need to be merged along with default compose.yaml file.   
+```bash
+cd GenAIExamples/ChatQnA/docker_compose/intel/hpu/gaudi/
+docker compose -f compose.yaml -f compose_telemetry.yaml up -d
+```
+
 Refer to the [Gaudi Guide](./docker_compose/intel/hpu/gaudi/README.md) to build docker images from source.
 
 ### Deploy ChatQnA on Xeon
@@ -242,6 +255,11 @@ Find the corresponding [compose.yaml](./docker_compose/intel/cpu/xeon/compose.ya
 cd GenAIExamples/ChatQnA/docker_compose/intel/cpu/xeon/
 docker compose up -d
 ```
+To enable Open Telemetry Tracing, compose_telemetry.yaml file need to be merged along with default compose.yaml file.   
+```bash
+cd GenAIExamples/ChatQnA/docker_compose/intel/cpu/xeon/
+docker compose -f compose.yaml -f compose_telemetry.yaml up -d
+```
 
 Refer to the [Xeon Guide](./docker_compose/intel/cpu/xeon/README.md) for more instructions on building docker images from source.
 
@@ -346,7 +364,7 @@ OPEA microservice deployment can easily be monitored through Grafana dashboards
 
 ## Tracing Services with OpenTelemetry Tracing and Jaeger
 
-> NOTE: limited support. Only LLM inference serving with TGI on Gaudi is enabled for this feature.
+> NOTE: This feature is disabled by default. Please check the Deploy ChatQnA sessions for how to enable this feature with compose_telemetry.yaml file.  
 
 OPEA microservice and TGI/TEI serving can easily be traced through Jaeger dashboards in conjunction with OpenTelemetry Tracing feature. Follow the [README](https://github.com/opea-project/GenAIComps/tree/main/comps/cores/telemetry#tracing) to trace additional functions if needed.