Updating readme with go link and modern app link

Author: Kent

README.md

@@ -45,8 +45,10 @@ This workshop is offered in different programming languages so that you can choo
 * [**Python**](https://github.com/aws-samples/aws-modern-application-workshop/tree/python)
 * [**.NET**](https://github.com/aws-samples/aws-modern-application-workshop/tree/dotnet)
 * [**Java**](https://github.com/aws-samples/aws-modern-application-workshop/tree/java)
+* [**Go**](https://github.com/aws-samples/aws-modern-application-workshop/tree/go)
 * More coming soon!
 
 
 ### AWS Developer Center
 For more details on tools and services for developers provided by AWS, please visit our [Developer Center](https://developer.aws).
+For information on best practices for modern application development, please [visit here](https://aws.amazon.com/modern-apps/).