chore: address comments

Author: amlannandy

data/docs/frontend-monitoring/sending-traces-with-opentelemetry.mdx

@@ -89,6 +89,7 @@ The instrumentation file is required to setup the `OTLPTraceExporter` and `WebTr
     import { XMLHttpRequestInstrumentation } from '@opentelemetry/instrumentation-xml-http-request';
     import { registerInstrumentations } from '@opentelemetry/instrumentation';
     import { resourceFromAttributes } from '@opentelemetry/resources';
+    import { ZoneContextManager } from '@opentelemetry/context-zone';
 
     const exporter = new OTLPTraceExporter({
       // For self-hosted version, please use the collector url instead.
@@ -106,7 +107,9 @@ The instrumentation file is required to setup the `OTLPTraceExporter` and `WebTr
       spanProcessors: [new BatchSpanProcessor(exporter)],
     });
 
-    provider.register();
+    provider.register({
+      contextManager: new ZoneContextManager(),
+    });
 
     registerInstrumentations({
       instrumentations: [
@@ -141,6 +144,7 @@ The instrumentation file is required to setup the `OTLPTraceExporter` and `WebTr
     import { XMLHttpRequestInstrumentation } from '@opentelemetry/instrumentation-xml-http-request';
     import { registerInstrumentations } from '@opentelemetry/instrumentation';
     import { resourceFromAttributes } from '@opentelemetry/resources';
+    import { ZoneContextManager } from '@opentelemetry/context-zone';
 
     const exporter = new OTLPTraceExporter({
       // For self-hosted version, please use the collector url instead.
@@ -158,7 +162,9 @@ The instrumentation file is required to setup the `OTLPTraceExporter` and `WebTr
       spanProcessors: [new BatchSpanProcessor(exporter)],
     });
 
-    provider.register();
+    provider.register({
+      contextManager: new ZoneContextManager(),
+    });
 
     registerInstrumentations({
       instrumentations: [
@@ -430,41 +436,6 @@ Going through each of the 3 instrumentations set up:
 To link your frontend and backend traces, you need to instrument your backend to send traces. Check out this [document](https://signoz.io/docs/instrumentation/overview/) to instrument your backend.
 Once done, your frontend traces should automatically get linked with your backend traces.
 
-For the purpose of this guide, we have setup a simple Node.js API with instrumentation.
-
-```ts:backend.ts
-import { NodeSDK } from '@opentelemetry/sdk-node'
-import { OTLPTraceExporter } from '@opentelemetry/exporter-trace-otlp-http'
-import { resourceFromAttributes } from '@opentelemetry/resources'
-import { getNodeAutoInstrumentations } from '@opentelemetry/auto-instrumentations-node'
-
-const sdk = new NodeSDK({
-  resource: resourceFromAttributes({
-    'service.name': '<SERVICE_NAME>',
-  }),
-  traceExporter: new OTLPTraceExporter({
-    url: `https://ingest.<INGESTION_REGION>.signoz.cloud:443/v1/traces`,
-    headers: {
-      // Optional for the self-hosted version
-      'signoz-ingestion-key': '<INGESTION_KEY>',
-    },
-  }),
-  instrumentations: [getNodeAutoInstrumentations()],
-})
-
-sdk.start()
-```
-
-```ts:backend.ts
-app.post('<api-endpoint>', (req, res) => {
-  try {
-    // Your api logic
-  } catch (error) {
-    // Your error handling logic
-  }
-})
-```
-
 ### Step 5: Viewing Captured Traces in SigNoz
 
 The captured traces can then be viewed in the [Traces Explorer](https://signoz.io/docs/product-features/trace-explorer/).