docs: Add platform tags to Electron integration

Author: kamilogorek

docs/integrations/electron.rst

@@ -19,7 +19,7 @@ First, let's configure ``main process``, which uses Node.js SDK:
 
 .. code-block:: javascript
 
-    var Raven = require('raven'):
+    var Raven = require('raven');
 
     Raven.config('___PUBLIC_DSN___', {
       captureUnhandledRejections: true
@@ -29,12 +29,42 @@ And now ``renderer process``, which uses Browser SDK:
 
 .. code-block:: javascript
 
-    var Raven = require('raven-js') ;
+    var Raven = require('raven-js');
     Raven.config('___PUBLIC_DSN___').install();
 
     window.addEventListener('unhandledrejection', function (event) {
         Raven.captureException(event.reason);
     });
 
-This configuration will also handle promises errors, which be handled in various way, however, by default Electron uses standard JS API.
+This configuration will also take care of unhandled Promise rejections, which can be handled in various way, however, by default Electron uses standard JS API.
 To learn more about handling promises, refer to :doc:`Promises <../usage#promises>` documentation.
+
+Sending environment information
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+It's often a good idea to send platform information alongside with caught error.
+Some things that we can easily add, but are not limited to are:
+
+- Environment type (browser/renderer)
+- Electron version
+- Chrome version
+- Operation System type
+- Operation System release
+
+You can configure both processes in the same way. To do his, require standard Node.js module `os` and add `tags` attribute to your `config` call:
+
+.. code-block:: javascript
+
+    var os = require('os');
+    var Raven = require('raven');
+
+    Raven.config('___PUBLIC_DSN___', {
+      captureUnhandledRejections: true,
+      tags: {
+        process: process.type,
+        electron: process.versions.electron,
+        chrome: process.versions.chrome,
+        platform: os.platform(),
+        platform_release: os.release()
+      }
+    }).install();