Tweak intro

We shouldn't yet be recommending production use - for now, let's continue to emphasise the development use case and mention staging/CI.

Signed-off-by: Aanand Prasad <[email protected]>

docs/index.md

@@ -11,8 +11,9 @@ With Compose, you can build clusters of containers which provide the resources
 application.
 
 You can use Compose to build your app with containers hosted locally, or on a
-remote server, including cloud-based instances. Compose can also be used to
-deploy code to production.
+remote server, including cloud-based instances - anywhere a Docker daemon can
+run. Its primary use case is for development environments, but it can be used
+just as easily for staging or CI.
 
 Using Compose is basically a three-step process.