template.yaml

AWSTemplateFormatVersion: '2010-09-09'
Transform: 'AWS::Serverless-2016-10-31'
Description: An AWS Serverless Specification template describing your function.
Parameters:
  PhoneNumber:
    Type: String
    Description: Phone number to receive daily dog picture (e.g. +12223334444).
  Hour:
    Type: String
    Default: 0
    Description: What hour to send the daily doggo picture (in UTC time).
Resources:
  getDogPic:
    Type: 'AWS::Serverless::Function'
    Properties:
      Handler: getDogPic.lambda_handler
      Runtime: python3.6
      MemorySize: 128
      Timeout: 5
      CodeUri: getDogPic.py
      Environment:
        Variables:
          SNS_TOPIC:
            Ref: SNSTopic
      Events:
        ScheduledEvent:
          Type: Schedule
          Properties:
            Schedule:
              'Fn::Join':
                - ' '
                - - cron(0
                  - Ref: Hour
                  - '* * ? *)'
      Policies:
        - SNSPublishMessagePolicy:
            TopicName:
              'Fn::GetAtt':
                - SNSTopic
                - TopicName
  SNSTopic:
    Type: 'AWS::SNS::Topic'
    Properties:
      DisplayName: DailyDoggo
      Subscription:
        - Endpoint:
            Ref: PhoneNumber
          Protocol: sms