gistfile1.txt

{
    "AWSTemplateFormatVersion": "2010-09-09",
    "Resources": {
        "AppendItemToListFunction": {
            "Properties": {
                "Code": {
                    "ZipFile": {
                        "Fn::Join": [
                            "",
                            [
                                "var response = require('cfn-response');",
                                "exports.handler = function(event, context) {",
                                "   var responseData = {Value: event.ResourceProperties.List};",
                                "   responseData.Value.push(event.ResourceProperties.AppendedItem);",
                                "   response.send(event, context, response.SUCCESS, responseData);",
                                "};"
                            ]
                        ]
                    }
                },
                "Handler": "index.handler",
                "Role": {
                    "Fn::GetAtt": [
                        "LambdaExecutionRole",
                        "Arn"
                    ]
                },
                "Runtime": "nodejs"
            },
            "Type": "AWS::Lambda::Function"
        },
        "LambdaExecutionRole": {
            "Properties": {
                "AssumeRolePolicyDocument": {
                    "Statement": [
                        {
                            "Action": [
                                "sts:AssumeRole"
                            ],
                            "Effect": "Allow",
                            "Principal": {
                                "Service": [
                                    "lambda.amazonaws.com"
                                ]
                            }
                        }
                    ],
                    "Version": "2012-10-17"
                },
                "Path": "/",
                "Policies": [
                    {
                        "PolicyDocument": {
                            "Statement": [
                                {
                                    "Action": [
                                        "logs:*"
                                    ],
                                    "Effect": "Allow",
                                    "Resource": "arn:aws:logs:*:*:*"
                                }
                            ],
                            "Version": "2012-10-17"
                        },
                        "PolicyName": "root"
                    }
                ]
            },
            "Type": "AWS::IAM::Role"
        }
    }
}