FEATURE ASH-229: Support cor in aws vertice readme fix (#32)

Co-authored-by: Kristián Leško <[email protected]>

README.md

@@ -17,9 +17,18 @@ granted to Vertice in your account.
 
 > [!IMPORTANT]  
 > Make sure you are in the **us-east-1** region.
-> See [Region Selection](#region-selection) for explanation.
-> Before enabling an AWS Data Export report (COR format)
-> you need to have enabled **Cost Optimization Hub** in **Billing and Cost Management** in your **Billing AWS Account**
+> See [Region Selection](#region-selection) for explanation.</br>
+> Before enabling an AWS Data Export report (COR format) through this template:
+>* Create the **AWSServiceRoleForBCMDataExports** service-linked role
+>>  * In the AWS Console, go to the **Billing and Cost Management** page
+>>  * On this page navigate to **Data Exports** -> Click **Create** -> Select **Standard data export** and **Cost optimization recommendations**
+>>  * Now you should see a warning table with the following title: **Exports of Cost Optimization Recommendations requires a Service Linked Role (SLR)**
+>>>    * If you don't see the warning, you have already created the **AWSServiceRoleForBCMDataExports** service-linked role.
+>>  * In this warning table, click the **Create service-linked role** button, and it will create the necessary role for you.
+>>  * You can leave the page now, without finishing the creation of the Data export, or you can continue with the settings below
+>![cor_service_linked_role_creation.png](readme_resources/cor_service_linked_role_creation.png)
+>* Enable **Cost Optimization Hub** in **Billing and Cost Management** in your **Billing AWS Account**:
+>>![cost_optimization_hub.png](readme_resources/cost_optimization_hub.png)
 
 The [Vertice governance CloudFormation template](templates/governance.yaml) is published
 to the following S3 address: