update fb app creation steps

plugins/talk-plugin-facebook-auth/README.md

@@ -11,23 +11,43 @@ plugin:
         - Client
 ---
 
-Enables sign-in via Facebook via the server side passport middleware.
+Enables sign-in via Facebook via the server side passport middleware. Requires creating and registering a login app with FaceBook. 
 
-Configuration:
+**Configuration:**
 
 - `TALK_FACEBOOK_APP_ID` (**required**) - The Facebook App ID for your Facebook
-  Login enabled app. You can learn more about getting a Facebook App ID at the
-  [Facebook Developers Portal](https://developers.facebook.com) or by visiting
-  the [Creating an App ID](https://developers.facebook.com/docs/apps/register)
-  guide. This is only required while the `talk-plugin-facebook-auth` plugin is
+  Login enabled app. This is only required while the `talk-plugin-facebook-auth` plugin is
   enabled.
 - `TALK_FACEBOOK_APP_SECRET` (**required**) - The Facebook App Secret for your
-  Facebook Login enabled app. You can learn more about getting a Facebook App
-  Secret at the [Facebook Developers Portal](https://developers.facebook.com)
-  or by visiting the
-  [Creating an App ID](https://developers.facebook.com/docs/apps/register)
-  guide. This is only required while the `talk-plugin-facebook-auth` plugin is
+  Facebook Login enabled app. This is only required while the `talk-plugin-facebook-auth` plugin is
   enabled.
+  
+You can learn more about getting a Facebook App ID at the
+  [Facebook Developers Portal](https://developers.facebook.com) or by visiting
+  their [Creating an App ID](https://developers.facebook.com/docs/apps/register)
+  guide.
+
+**Setting up your FaceBook app:**
+* Go to My Apps > Create A New App
+* Add an App Name and Email to create an app id
+* Confirm that you are not a robot
+* Go to Settings > Basic:
+    * add app domains (your Talk domain)
+    * add a link to your privacy policy
+    * add a link to your terms of service
+    * save changes
+* Go to Settings > Advanced:
+    * turn on "Require App Secret"
+* Under "Products" click + to add a Product:
+    * Select "Let people log in with FaceBook"
+    * choose `www` 
+    * enter your Talk domain url
+    * click _Next_ several times to get through the add code steps (You do not need to modify any code, the plugin takes care of this part for you.)
+* Go back to Settings > Basic:
+    * enter the callback url
+    * Locate your App Id and App Secret, set these as config vars on your instance of Talk
+* Toggle the "Live" button to make app live
+
 
 _NOTE: Facebook auth requires your site to use `https` (SSL) not `http`. If your site is not `https` you can not use this plugin!_