Added ingress settings note to cloudrun docs (#4687) (#3151)

Signed-off-by: Modular Magician <[email protected]>

Author: modular-magician

.changelog/4687.txt

@@ -0,0 +1,3 @@
+```release-note:none
+
+```

google-beta/resource_cloud_run_service.go

@@ -550,7 +550,12 @@ info: http://kubernetes.io/docs/user-guide/annotations
 
 **Note**: The Cloud Run API may add additional annotations that were not provided in your config.
 If terraform plan shows a diff where a server-side annotation is added, you can add it to your config
-or apply the lifecycle.ignore_changes rule to the metadata.0.annotations field.`,
+or apply the lifecycle.ignore_changes rule to the metadata.0.annotations field.
+
+Cloud Run (fully managed) uses the following annotation keys to configure features on a Service:
+
+- 'run.googleapis.com/ingress' sets the [ingress settings](https://cloud.google.com/sdk/gcloud/reference/run/deploy#--ingress)
+  for the Service. For example, '"run.googleapis.com/ingress" = "all"'.`,
 							Elem: &schema.Schema{Type: schema.TypeString},
 						},
 						"labels": {

website/docs/r/cloud_run_service.html.markdown

@@ -624,6 +624,9 @@ The `metadata` block supports:
   **Note**: The Cloud Run API may add additional annotations that were not provided in your config.
   If terraform plan shows a diff where a server-side annotation is added, you can add it to your config
   or apply the lifecycle.ignore_changes rule to the metadata.0.annotations field.
+  Cloud Run (fully managed) uses the following annotation keys to configure features on a Service:
+  - `run.googleapis.com/ingress` sets the [ingress settings](https://cloud.google.com/sdk/gcloud/reference/run/deploy#--ingress)
+    for the Service. For example, `"run.googleapis.com/ingress" = "all"`.
 
 ## Attributes Reference