feat(crud-master-py): clarify postman requirements for audit

subjects/devops/crud-master-py/README.md

@@ -73,10 +73,12 @@ The `movies` table will contain the following columns:
 ##### Testing the Inventory API
 
 In order to test the correctness of your API you should use Postman or a
-similar tool. You could create one or more tests for every endpoint and then
+similar tool. You have to create one or more tests for every endpoint and then
 export the configuration, so you will be able to reproduce the tests on
 different machines easily.
 
+> The configuration will be checked during the audit.
+
 #### API 2: Billing
 
 ##### Definition of the Inventory API
@@ -91,7 +93,6 @@ going to be a "stringified" JSON object as in this example:
   "number_of_items": "5",
   "total_amount": "180"
 }
-
 ```
 
 It will parse the message and create a new entry in the `orders_db` database.