add otel settings

Author: ks6088ts

.env.template

@@ -1,5 +1,8 @@
 # Azure Application Insights
 APPLICATIONINSIGHTS_CONNECTION_STRING="InstrumentationKey=xxx;IngestionEndpoint=https://xxx.applicationinsights.azure.com/;LiveEndpoint=https://xxx.livediagnostics.monitor.azure.com/"
+OTEL_RESOURCE_ATTRIBUTES="service.namespace=template-fastapi-namespace,service.instance.id=template-fastapi-instance"
+OTEL_SERVICE_NAME="template-fastapi-service"
+OTEL_TRACES_SAMPLER_ARG="1"
 
 # Azure OpenAI Service
 AZURE_OPENAI_ENDPOINT="https://<YOUR_AOAI_NAME>.openai.azure.com/"