adds custom deployment config support.

- new customType property to indicate that should not use the prefix for default CodeDeploy config
- adds unit test for the case where customType is true
- adds test case where customType is true
- adds readme descriptions of the new feature

Author: rodrigo-salvatore-radix

README.md

@@ -43,6 +43,7 @@ functions:
       - http: GET hello
     deploymentSettings:
       type: Linear10PercentEvery1Minute
+      customType: false
       alias: Live
       preTrafficHook: preHook
       postTrafficHook: postHook
@@ -60,7 +61,7 @@ You can see a working example in the [example folder](./example/).
 
 ## <a name="configuration"></a>Configuration
 
-* `type`: (required) defines how the traffic will be shifted between Lambda function versions. It must be one of the following:
+* `type`: (required) defines how the traffic will be shifted between Lambda function versions. It must be one of the following if customType is not true:
   - `Canary10Percent5Minutes`: shifts 10 percent of traffic in the first increment. The remaining 90 percent is deployed five minutes later.
   - `Canary10Percent10Minutes`: shifts 10 percent of traffic in the first increment. The remaining 90 percent is deployed 10 minutes later.
   - `Canary10Percent15Minutes`: shifts 10 percent of traffic in the first increment. The remaining 90 percent is deployed 15 minutes later.
@@ -70,6 +71,7 @@ You can see a working example in the [example folder](./example/).
   - `Linear10PercentEvery3Minutes`: shifts 10 percent of traffic every three minutes until all traffic is shifted.
   - `Linear10PercentEvery10Minutes`: shifts 10 percent of traffic every 10 minutes until all traffic is shifted.
   - `AllAtOnce`: shifts all the traffic to the new version, useful when you only need to execute the validation hooks.
+* `customType`: (optional) When set to true you can use your custom CodeDeploy Deployment Configurations. (more info [here](https://docs.aws.amazon.com/codedeploy/latest/userguide/deployment-configurations.html)).
 * `alias`: (required) name that will be used to create the Lambda function alias.
 * `preTrafficHook`: (optional) validation Lambda function that runs before traffic shifting. It must use the CodeDeploy SDK to notify about this step's success or failure (more info [here](https://docs.aws.amazon.com/codedeploy/latest/userguide/reference-appspec-file-structure-hooks.html)).
 * `postTrafficHook`: (optional) validation Lambda function that runs after traffic shifting. It must use the CodeDeploy SDK to notify about this step's success or failure (more info [here](https://docs.aws.amazon.com/codedeploy/latest/userguide/reference-appspec-file-structure-hooks.html))