Update serverless/pages/connecting-to-es-endpoint.asciidoc

Co-authored-by: Liam Thompson <[email protected]>

Author: kosabogi

serverless/pages/connecting-to-es-endpoint.asciidoc

@@ -1,6 +1,11 @@
 [[elasticsearch-connecting-to-es-serverless-endpoint]]
 = Connecting to your Elasticsearch Serverless endpoint
 
+[TIP]
+====
+This page assumes you have already <<elasticsearch-get-started-create-project,created an {es-serverless} project>>.
+====
+
 Learn how to securely connect to your Elasticsearch Serverless instance.
 
 To connect to your Elasticsearch instance from your applications, client libraries, or tools like `curl`, you'll need two key pieces of information: an API key and your endpoint URL. This guide shows you how to get these connection details and verify they work.