docs: add EDOT SDK encouragement to index and supported-technologies (#4997)

Author: alexandra5000

docs/docset.yml

@@ -9,6 +9,7 @@ cross_links:
   - ecs
   - ecs-logging
   - ecs-logging-nodejs
+  - elastic-otel-node
   - elasticsearch
 toc:
   - toc: reference

docs/reference/index.md

@@ -12,8 +12,11 @@ applies_to:
 
 # APM Node.js agent [intro]
 
-The Elastic APM Node.js Agent sends performance metrics and errors to the APM Server. It has built-in support for the most popular frameworks and routers, as well as a simple API which allows you to instrument any application.
+The Elastic APM Node.js Agent sends performance metrics and errors to the APM Server. It has built-in support for the most popular frameworks and routers, as well as a basic API which allows you to instrument any application.
 
+:::::{note}
+Elastic supports OpenTelemetry, which allows logs, metrics, and trace signal collection for many of the [supported technologies](/reference/supported-technologies.md) below. Consider using the [EDOT Node.js SDK](elastic-otel-node://reference/edot-node/index.md) for observability data so you continue to get the full power of Elastic's platform.
+:::::
 
 ## How does the Agent work? [how-it-works]
 

docs/reference/supported-technologies.md

@@ -13,6 +13,8 @@ applies_to:
 
 The Elastic APM Node.js Agent automatically instruments various APIs in Node.js core and third-party frameworks and packages. This page lists all supported technologies and version ranges.
 
+Elastic supports OpenTelemetry, which allows logs, metrics, and trace signal collection for many of these technologies. Consider using the [EDOT Node.js SDK](elastic-otel-node://reference/edot-node/index.md) for observability data so you continue to get the full power of Elastic's platform.
+
 
 ## Node.js versions [compatibility-node]