chore: address the PR feedback

Signed-off-by: Sudhanshu Pandey <[email protected]>

Author: sp6370

examples/express/README.md

@@ -17,12 +17,23 @@ shows key aspects of tracing such as
 npm install
 ```
 
-Setup [Jaeger Tracing](https://www.jaegertracing.io/docs/2.0/getting-started/#in-docker)
+Start Jaeger in Docker for receiving tracing data (see [the Jaeger docs](https://www.jaegertracing.io/docs/2.0/getting-started/#in-docker) for more details about running Jaeger):
+```bash
+docker run --rm --name jaeger \
+  -p 5778:5778 \
+  -p 16686:16686 \
+  -p 4317:4317 \
+  -p 4318:4318 \
+  -p 14250:14250 \
+  -p 14268:14268 \
+  -p 9411:9411 \
+  jaegertracing/jaeger:2.0.0 \
+  --set receivers.otlp.protocols.http.endpoint=0.0.0.0:4318 \
+  --set receivers.otlp.protocols.grpc.endpoint=0.0.0.0:4317
+```
 
 ## Run the Application
 
-### Jaeger
-
 Run the server:
 
 ```sh

examples/express/package.json

@@ -4,8 +4,8 @@
   "version": "0.1.0",
   "description": "Example of Express integration with OpenTelemetry",
   "scripts": {
-    "jaeger:server": "cross-env EXPORTER=jaeger ts-node src/server.ts",
-    "jaeger:client": "cross-env EXPORTER=jaeger ts-node src/client.ts",
+    "server": "ts-node src/server.ts",
+    "client": "ts-node src/client.ts",
     "compile": "tsc -p ."
   },
   "repository": {

examples/express/src/tracer.ts

@@ -15,7 +15,6 @@ import { OTLPTraceExporter } from '@opentelemetry/exporter-trace-otlp-proto';
 import { Resource } from '@opentelemetry/resources';
 import { ATTR_SERVICE_NAME, ATTR_HTTP_ROUTE } from '@opentelemetry/semantic-conventions';
 
-const Exporter = OTLPTraceExporter;
 import { ExpressInstrumentation } from '@opentelemetry/instrumentation-express';
 import {HttpInstrumentation} from '@opentelemetry/instrumentation-http';
 
@@ -35,7 +34,7 @@ export const setupTracing = (serviceName: string) => {
     ],
   });
 
-  const exporter = new Exporter({});
+  const exporter = new OTLPTraceExporter({});
 
   provider.addSpanProcessor(new SimpleSpanProcessor(exporter));