add overview

Author: craigshoemaker

articles/container-apps/TOC.yml

@@ -156,15 +156,16 @@
       href: tutorial-scaling.md
 - name: Domains & certificates
   items:
-    - name: Custom domains & certificates
-      items:
-        - name: Set up custom domain with a free certificate
-          href: custom-domains-managed-certificates.md
-          displayName: Set up custom domain with a managed certificate
-        - name: Set up custom domain with existing certificate
-          href: custom-domains-certificates.md        
-        - name: Set up environment custom DNS suffix
-          href: environment-custom-dns-suffix.md
+  - name: Overview
+    href: certificates-overview.md
+  - name: Set up custom domain with a free certificate
+    href: custom-domains-managed-certificates.md
+    displayName: Set up custom domain with a managed certificate
+  - name: Set up custom domain with existing certificate
+    href: custom-domains-certificates.md        
+  - name: Set up environment custom DNS suffix
+    href: environment-custom-dns-suffix.md
+
 - name: Authentication
   items:
     - name: Overview

articles/container-apps/certificates-overview.md

@@ -0,0 +1,27 @@
+---
+title: Certificates in Azure Container Apps
+description: Learn the different options available to using and managing secure certificates in Azure Container Apps.
+services: container-apps
+author: craigshoemaker
+ms.service: container-apps
+ms.topic: conceptual
+ms.date: 03/28/2024
+ms.author: cshoe
+---
+
+# Certificates in Azure Container Apps
+
+You can add digital security certificates to [secure custom DNS names](configure-ssl-bindings.md) in Azure Container Apps to support secure communication among your container apps.
+
+The following table lists the options for you to add certificates in Container Apps:
+
+| Option | Description |
+|---|---|
+| [Create a free Container Apps managed certificate](./custom-domains-managed-certificates.md) | A private certificate that's free of charge and easy to use if you just need to secure your custom domain in Container Apps. |
+| Import a certificate from Key Vault | Useful if you use [Azure Key Vault](../key-vault/index.yml) to manage your [PKCS12 certificates](https://wikipedia.org/wiki/PKCS_12). See [Private certificate requirements](#private-certificate-requirements). |
+| [Upload a private certificate](./custom-domains-certificates) | You can upload a private certificate if you already have one. See [Private certificate requirements](#private-certificate-requirements). |
+
+## Next steps
+
+> [!div class="nextstepaction"]
+> [Set up custom domain with existing certificate](custom-domains-certificates.md)