Add Spring Boot Hello World guide

Add Spring Boot Hello World Guide

Fixes gh-3866

docs/manual/src/docs/asciidoc/index.adoc

@@ -409,6 +409,37 @@ Here is the list of improvements:
 * Re-organization of sample projects
 * Moved to GitHub issues
 
+[[samples]]
+== Samples and Guides (Start Here)
+
+If you are looking to get started with Spring Security, the best place to start is our Sample Applications.
+
+.Sample Applications
+|===
+| Source | Description | Guide
+
+| {gh-samples-url}/javaconfig/helloworld[Hello Spring Security]
+| Demonstrates how to integrate Spring Security with an existing application using Java-based configuration.
+| link:../../guides/html5/helloworld-javaconfig.html[Hello Spring Security Guide]
+
+| {gh-samples-url}/boot/helloworld[Hello Spring Security Boot]
+| Demonstrates how to integrate Spring Security with an existing Spring Boot application.
+| link:../../guides/html5/helloworld-boot.html[Hello Spring Security Boot Guide]
+
+| {gh-samples-url}/xml/helloworld[Hello Spring Security XML]
+| Demonstrates how to integrate Spring Security with an existing application using XML-based configuration.
+| link:../../guides/html5/helloworld-xml.html[Hello Spring Security XML Guide]
+
+| {gh-samples-url}/javaconfig/hellomvc[Hello Spring MVC Security]
+| Demonstrates how to integrate Spring Security with an existing Spring MVC application.
+| link:../../guides/html5/hellomvc-javaconfig.html[Hello Spring MVC Security Guide]
+
+| {gh-samples-url}/javaconfig/form[Custom Login Form]
+| Demonstrates how to create a custom login form.
+| link:../../guides/html5/form-javaconfig.html[Custom Login Form Guide]
+
+|===
+
 [[jc]]
 == Java Configuration