Stress the required version of node JS

README.md

@@ -78,7 +78,7 @@ the latest master builds [here](http://grafana.org/download/builds)
 ### Dependencies
 
 - Go 1.5
-- NodeJS
+- NodeJS v0.12.0
 - [Godep](https://github.com/tools/godep)
 
 ### Get Code
@@ -110,7 +110,7 @@ go run build.go build
 
 ### Building frontend assets
 
-To build less to css for the frontend you will need a recent version of of node (v0.12.0),
+To build less to css for the frontend you will need a recent version of of **node (v0.12.0)**,
 npm (v2.5.0) and grunt (v0.4.5). Run the following:
 
 ```bash