Clarify Node/NPM prerequisites

* Clarify Node/NPM prerequisites
* Link to AEM documentation

Fixes #92

Author: vladbailescu

Diff for: theme/README.md

@@ -2,7 +2,11 @@
 
 This is the theme of the standard site template for Adobe Experience Manager (AEM).
 
-This theme can be modified to customize the visual appearance of sites created from the standard site template.
+This theme can be modified to customize the visual appearance of sites created from the standard site template and deployed using the [AEM Front-End Pipeline](https://experienceleague.adobe.com/docs/experience-manager-cloud-service/content/implementing/developing/developing-with-front-end-pipelines.html?lang=en) in Cloud Manager.
+
+## Suported Node version(s)
+
+By default Cloud Manager will use Node 14 to execute the Front-End Pipeline. Versions 12 and 16 are also available for the pipeline and can be selected by using the `CM_CUSTOM_VAR_NODE_VERSION` environment variable.
 
 ## Structure