Merge pull request #259958 from RoseHJM/ade-default-catalog-updates

ADE- minor edits for quick start catalog

Author: prmerger-automator[bot]

articles/deployment-environments/concept-environments-key-concepts.md

@@ -64,7 +64,9 @@ Project environment types allow you to automatically apply the right set of poli
 
 ## Catalogs
 
-Catalogs help you provide a set of curated IaC templates for your development teams to create environments. You can attach either a [GitHub repository](https://docs.github.com/repositories/creating-and-managing-repositories/about-repositories) or an [Azure DevOps Services repository](/azure/devops/repos/get-started/what-is-repos) as a catalog. 
+Catalogs help you provide a set of curated IaC templates for your development teams to create environments. Microsoft provides a [*quick start* catalog](https://github.com/microsoft/devcenter-catalog) that contains a set of sample environment defintions. You can attach the quick start catalog to a dev center to make these environment defintions available to all the projects associated with the dev center. You can modify the sample environment definitions to suit your needs. 
+
+Alternately, you can attach your own catalog. You can attach either a [GitHub repository](https://docs.github.com/repositories/creating-and-managing-repositories/about-repositories) or an [Azure DevOps Services repository](/azure/devops/repos/get-started/what-is-repos) as a catalog. 
 
 Deployment environments scan the specified folder of the repository to find [environment definitions](#environment-definitions). The environments then make those environment definitions available to all the projects associated with the dev center.
 

articles/deployment-environments/how-to-configure-catalog.md

@@ -21,7 +21,7 @@ Deployment Environments supports catalogs hosted in Azure Repos (the repository
 - To learn how to host a repository in GitHub, see [Get started with GitHub](https://docs.github.com/get-started).
 - To learn how to host a Git repository in an Azure DevOps project, see [Azure Repos](https://azure.microsoft.com/products/devops/repos/).
 
-Microsoft offers a [sample catalog](https://aka.ms/deployment-environments/SampleCatalog) that you can use as your repository. You also can use your own private repository, or you can fork and customize the environment definitions in the sample catalog.
+Microsoft offers a [*quick start* catalog](https://github.com/microsoft/devcenter-catalog) that you can add to the dev center, and a [sample catalog](https://aka.ms/deployment-environments/SampleCatalog) that you can use as your repository. You also can use your own private repository, or you can fork and customize the environment definitions in the sample catalog.
 
 ## Configure a managed identity for the dev center