Add some more information to the Readme

stack-showcase/README.md

@@ -1,2 +1,24 @@
 # 📜 ZenML Stack Show Case
 
+This project aims to demonstrate the power of stacks. The code in this 
+project assumes that you ave quite a few stacks registered already:
+
+* default
+* local-sagemaker-step-operator-stack
+  * `default` Orchestrator
+  * `s3` Artifact Store
+  * `local` Image Builder
+  * `aws` Container Registry
+  * `Sagemaker` Step Operator
+* sagemaker-airflow-stack
+  * `Airflow` Orchestrator
+  * `s3` Artifact Store
+  * `local` Image Builder
+  * `aws` Container Registry
+  * `Sagemaker` Step Operator
+* sagemaker-stack
+  * `Sagemaker` Orchestrator
+  * `s3` Artifact Store
+  * `local` Image Builder
+  * `aws` Container Registry
+  * `Sagemaker` Step Operator