Add documentation on repository credentials.

SoManyHs · SoManyHs · commit a6373d6d154f · 2018-08-21T12:07:37.000-07:00
https://docs.aws.amazon.com/AmazonECS/latest/APIReference/API_RepositoryCredentials.html
diff --git a/README.md b/README.md
@@ -422,6 +422,8 @@ task_definition:
   services:
     <service_name>:
       essential: boolean
+      repository_credentials:
+        credentials_parameter: string
       cpu_shares: integer
       mem_limit: string
       mem_reservation: string
@@ -444,10 +446,11 @@ Fields listed under `task_definition` correspond to fields that will be included
 
 * `task_role_arn` should be the ARN of an IAM role. **NOTE**: If this role does not have the proper permissions/trust relationships on it, the `up` command will fail.
 
-* `services` correspond to the services listed in your docker compose file, with `service_name` matching the name of the container you wish to run. Its fields will be merged into an [ECS Container Definition](http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ecs-taskdefinition-containerdefinitions.html). 
-  * If the [`essential`](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ecs-taskdefinition-containerdefinitions.html#cfn-ecs-taskdefinition-containerdefinition-essential) field is not specified, the value defaults to true. 
-  * If you are using Docker compose version 3, the `cpu_shares`, `mem_limit`, and `mem_reservation` fields are optional and must be specified in the ECS params file rather than the compose file. 
+* `services` correspond to the services listed in your docker compose file, with `service_name` matching the name of the container you wish to run. Its fields will be merged into an [ECS Container Definition](http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ecs-taskdefinition-containerdefinitions.html).
+  * If the [`essential`](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ecs-taskdefinition-containerdefinitions.html#cfn-ecs-taskdefinition-containerdefinition-essential) field is not specified, the value defaults to true.
+  * If you are using Docker compose version 3, the `cpu_shares`, `mem_limit`, and `mem_reservation` fields are optional and must be specified in the ECS params file rather than the compose file.
   * In Docker compose version 2, the `cpu_shares`, `mem_limit`, and `mem_reservation` fields can be specified in either the compose or ECS params file. If they are specified in the ECS params file, the values will override values present in the compose file.
+  * If you are using a private repository for pulling images, `repository_credentials` allows you to specify an AWS Secrets Manager secret ARN for the name of the secret containing your private repository credentials as a `credential_parameter`.
 
 Example `ecs-params.yml` with service resources specified:
 ```
