update doc

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AISKULight/README.md

@@ -22,7 +22,7 @@
 Application Insights - Web Basic SDK
 
 Application Insights AI SKU Light is a package that combines minimum required packages for Web scenarios.  
-Refer to [ApplicationInsights-JS](../README.MD) for more details on getting started.
+Refer to [ApplicationInsights-JS](../README.md) for more details on getting started.
 
 ## Contributing
 

README.md

@@ -21,7 +21,7 @@
 [![minified size size](https://img.badgesize.io/https://js.monitor.azure.com/scripts/b/ai.2.min.js.svg?label=minified%20size)](https://img.badgesize.io/https://js.monitor.azure.com/scripts/b/ai.2.min.js.svg?label=minified%20size)
 [![gzip size](https://img.badgesize.io/https://js.monitor.azure.com/scripts/b/ai.2.min.js.svg?compression=gzip&softmax=30000&max=35000)](https://img.badgesize.io/https://js.monitor.azure.com/scripts/b/ai.2.min.js.svg?compression=gzip&softmax=30000&max=35000)
 
-> ***Note:*** The documentation for `applicationinsights-js@1.0.20` has moved [here](./legacy/README.md). If you are looking to upgrade to the new version of the SDK, please see the [Upgrade Guide](#upgrading-from-the-old-version-of-application-insights). For Node.js instrumentation reference this [repository](https://github.com/microsoft/ApplicationInsights-node.js). 
+> ***Note:*** The documentation for `applicationinsights-js@1.0.20` has moved [here](./legacy/README.md). If you are looking to upgrade to the new version of the SDK, please see the [Upgrade Guide](#upgrading-from-the-old-version-of-application-insights). 
 
 ## Beta (v3.x) Release Breaking changes
 
@@ -36,6 +36,13 @@ Some of the major changes include
 
 See the [beta](https://github.com/Microsoft/ApplicationInsights-JS/tree/beta) for the current documented set of breaking changes, all feedback on excessive breaks are welcome current release target is early (1st quarter) 2023.
 
+
+## Before Getting Started
+
+This repo does not intended for non-browser enverionments, for example, the Node.js applications.
+
+For instrumenting a Node.js app, please refer this [repository](https://github.com/microsoft/ApplicationInsights-node.js). 
+
 ## Getting Started
 
 1. Create an Application Insights resource in Azure by following [these instructions](https://docs.microsoft.com/en-us/azure/application-insights/app-insights-javascript?toc=/azure/azure-monitor/toc.json).