Adds interpolate content to apply page

themes/default/content/docs/concepts/inputs-outputs/apply.md

@@ -1059,6 +1059,12 @@ Duration: 5s
 
 The result of the call to {{< pulumi-apply >}} is a new Output<T>, meaning the `url` variable is now of type Output. This variable will wait for the new value to be returned from the {{< pulumi-apply >}} function, and any [dependencies](/docs) of the original output (i.e. the `public DNS` property of the `server` resource) are also kept in the resulting Output<T>.
 
+#### Using string interpolation
+
+There is an easier way to generate a concatenated string value using an output, and that is by using interpolation. Pulumi exposes interpolation helpers that enables you to create strings that contain outputs. These interpolation methods wrap [apply](/docs/concepts/inputs-outputs/apply/) and [all](/docs/concepts/inputs-outputs/all/) with an interface that resembles your language's native string formatting functions. The example below demonstrates how to create a URL from the hostname and port output values of a web server.
+
+{{< example-program path="aws-s3bucket-bucketobject-interpolate" >}}
+
 ### Outputs and JSON
 
 Often in the course of working with web technologies, you encounter JavaScript Object Notation (JSON) which is a popular specification for representing data. In many scenarios, you'll need to embed resource outputs into a JSON string. In these scenarios, you need to first _wait for the returned_ output, _then_ build the JSON string.