Dynamically named S3 Bucket Trigger

template.yaml

Transform: AWS::Serverless-2016-10-31

Resources:
  Lambda:
    Type: AWS::Serverless::Function
    Properties:
      Runtime: nodejs8.10
      InlineCode: |
        exports.handler = (event, ctx, cb) => {
          console.log(JSON.stringify(event));
          cb(null, 'SUCCESS');
        };
      Handler: index.handler
      Events:
        PhotoUpload:
          Type: S3
          Properties:
            Bucket: !Ref S3Bucket
            Events: s3:ObjectCreated:*
  S3Bucket:
    Type: AWS::S3::Bucket
    # No Properties here at all.