Tweak the wording

Author: gaearon

README.md

@@ -44,7 +44,7 @@ npm install -g create-react-app
 
 **We strongly recommend to use Node >= 6 and npm >= 3 for faster installation speed and better disk usage.** You can use [nvm](https://github.com/creationix/nvm#usage) to easily switch Node versions between different projects.
 
-**This tool doesn’t assume a Node backend**. The Node installation is only required for the build tools that rely on it locally, such as Webpack and Babel.
+**This tool doesn’t assume a Node backend**. The Node installation is only required for Create React App itself.
 
 ### Creating an App