Merge branch 'readme-improvements' into 'master'

Readme Improvements

Not sure about this, still a FIXME in there.

README.md

@@ -2,11 +2,18 @@ This repository stores all the dependency cookbooks of the GitLab cookbook as re
 #### Usage
-* Create a custom layer or use a predefined `Rails app server` layer.
-* Edit the layer
-* Under `Custom Chef Recipes` supply the url to this repository
+* Create a custom stack
+* Select the `Advanced` dropdown
+* Set `Use custom chef coobooks` to Yes
+* Under `Repository URL` supply the url to this repository: `https://gitlab.com/gitlab-com/cookbook-gitlab-opsworks.git` (no SSH key or branch/revision needed)
+* Under `Custom Chef JSON` supply the JSON of the custom setting for your instance. You can find example in the [cookbook repository](https://gitlab.com/gitlab-org/cookbook-gitlab/blob/master/doc/production.md)
+* Save the stack by pressing `Add Stack`
+* Go to `Layers` and select `Add layer`
+* Under `Layer type` select custom and save
+* Select `edit` of newly created layer
+* In `Custom Chef Recipes` section
 * Under `Setup` write `gitlab::setup` and press the + sign to add
 * Under `Deploy` write `gitlab::deploy` and press the + sign to add
 * Save changes made to the layer (Scroll to the bottom of the page for the Save button)
 * Go to Instances
-* Create a new instance(or use an existing one) and add the previously edited layer
+* Create a new instance (we recommand a c3.large) and add the previously edited layer