README: removed step to run npm install

Author: willpiers

README.md

@@ -14,7 +14,7 @@ First start by pulling down the git repo:
 git clone https://github.com/lightninglabs/lightning-app.git
 ```
 
-Then go inside the project folder and run npm install (grab a coffee, this might take a while):
+Then go inside the project folder and run the following commands (grab a coffee, this might take a while):
 ```
 cd lightning-app
 npm run setup