make the env vars unique and update the README

README.md

@@ -1,2 +1,9 @@
-# aws-eventbus
-Nullstone module to create an AWS EventBus
+This capability provides the necessary env variables in order to create schedules for the connected AWS EventBridge EventBus.
+
+The env variables injected are:
+| Variable | Description |
+| --- | --- |
+| `EVENTBUS_ARN` | The arn of the AWS EventBridge EventBus. |
+| `EVENTBUS_NAME` | The name of the AWS EventBridge EventBus. |
+| `EVENTBUS_SCHEDULER_GROUP_NAME` | The name of the scheduler group used as the landing zone for creating schedules. |
+| `EVENTBUS_SCHEDULER_ROLE_ARN` | The arn of the IamRole to use when creating schedules. This role has all the permissions required to create a schedule. |

outputs.tf

@@ -9,11 +9,11 @@ output "env" {
       value = local.eventbus_name
     },
     {
-      name  = "SCHEDULER_GROUP_NAME"
+      name  = "EVENTBUS_SCHEDULER_GROUP_NAME"
       value = local.scheduler_group_name
     },
     {
-      name  = "SCHEDULER_ROLE_ARN"
+      name  = "EVENTBUS_SCHEDULER_ROLE_ARN"
       value = local.scheduler_role_arn
     },
   ]