Add new parm to config

Author: kpturner

src/config.js

@@ -14,6 +14,7 @@ class Config {
       ec2InstanceId: core.getInput('ec2-instance-id'),
       iamRoleName: core.getInput('iam-role-name'),
       runnerHomeDir: core.getInput('runner-home-dir'),
+      runAsService: core.getInput('run-runner-as-service')
     };
 
     const tags = JSON.parse(core.getInput('aws-resource-tags'));