Update README.md

Author: Nilan Marktanner

README.md

@@ -25,7 +25,7 @@ Once it's installed, you can deploy the Graphcool service based on the existing
 ```sh
 cd server
 yarn install
-graphcool deploy
+graphcool deploy server
 ```
 
 When prompted which cluster you want to deploy to, choose any of the **Shared Clusters** options (`shared-eu-west-1`, `shared-ap-northeast-1` or `shared-us-west-2`).