Added diagram to documentation index

docs/en/index.md

@@ -29,10 +29,20 @@ ABP can work with any database provider, while the following providers are suppo
 
 <img width="340" src="images/db-options.png" alt="ABP Database Providers" />
 
+## The ABP Platform
+
+ABP **bridges the gap** between ASP.NET Core and **real-world business application requirements**, allowing you to focus on your business code.
+
+The following diagram contains the core components of the **ABP Platform** and shows how ABP sits between **ASP.NET Core** and **Your Application**:
+
+![abp-overall-diagram-1600](D:\Github\abp\docs\en\images\abp-overall-diagram-1600.png)
+
 ## Exploring the Documentation
 
 ABP has a **comprehensive documentation** that not only explains ABP, but also includes **guides** and **samples** to help you on creating a **maintainable solution** by introducing and discussing common **software development principle and best practices**.
 
+The next sections highlight important ABP components and provides links to related documents.
+
 ### The Framework
 
 #### Architecture