Update README.md

README.md

@@ -40,7 +40,7 @@ Clone this repository locally:
 git clone https://github.com/maximegris/angular-electron.git
 ```
 
-Install dependencies with npm:
+Install dependencies with npm (used by Electron renderer process):
 
 ``` bash
 npm install
@@ -55,6 +55,13 @@ Please follow [Angular-cli documentation](https://github.com/angular/angular-cli
 npm install -g @angular/cli
 ```
 
+Install NodeJS dependencies with npm (used by Electron main process):
+
+``` bash
+cp app/
+npm install
+```
+
 ## To build for development
 
 - **in a terminal window** -> npm start