Add banners

snooty.toml

@@ -109,3 +109,26 @@ variant = "warning"
 value = """\
      Atlas Device Sync, Atlas Edge Server, Data API, HTTPS Endpoints, GraphQL, and Static Hosting are deprecated. Commands related to these features are also deprecated.\
     """
+
+[[banners]]
+targets = ["hosting/*.txt"]
+variant = "warning"
+value = """\
+     Static Hosting is deprecated. :ref:`Learn More <migrate-hosting-graphql>`.\
+    """
+
+[[banners]]
+targets = ["graphql/*.txt"]
+variant = "warning"
+value = """\
+     GraphQL is deprecated. :ref:`Learn More <migrate-hosting-graphql>`.\
+    """
+
+[[banners]]
+targets = ["authentication/*.txt"]
+variant = "info"
+value = """\
+     As of September 2024, the Atlas Device SDKs are deprecated and will reach end of life in September 2025.\
+     This will affect authentication, because there will no longer be incoming authentication requests.\
+     Refer to the :ref:`deprecation page for details <app-services-deprecation>`.\
+    """