Finish Atom Shell -> Electron

Author: Machiste Quintana

guides/index.md

@@ -11,7 +11,7 @@ description: Learning NodeGit
 
 - [Basics](install/)
 - [From source](install/from-source)
-- [Atom Shell](install/atom-shell/)
+- [Electron](install/electron/)
 - [NW.js](install/nw.js/)
 
 ***

guides/install/atom-shell/index.md

@@ -0,0 +1,35 @@
+---
+layout: full
+menu_item: guides
+title: Electron
+description: How to install NodeGit with Electron
+---
+
+[Return to all guides](../../)
+
+* * *
+
+Install for Electron
+----------------------
+
+For an application that is built using [Electron](https://github.com/atom/Electron) you'll need to have the `engines.electron` set to the version of Electron that you are targeting in your root `package.json` file.
+
+For example if you have an Electron app that's targeting version 0.20.7 your package.json file would look something like:
+
+```json
+{
+  "name": "elec-app",
+  "displayName": "My Electron app",
+  "version": "0.0.1",
+  "description": "",
+  "main": "main.js",
+  "author": "",
+  "engines": {
+    "electron": "0.20.7"
+  }
+}
+```
+
+And when doing an `npm install` or `apm install` inside of your Electron's root folder it will compile NodeGit targeting that version of Electron during the install.
+
+*NOTE: there are no pre-built binaries for Electron, you must rebuild NodeGit. Visit our [building guides](../from-source) for help*