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aws cloudformation deploy \
   --template-file serverless-output.yaml \
   --stack-name new-stack-name \
   --capabilities CAPABILITY_IAM

aws cloudformation package \
   --template-file example.yaml \
   --output-template-file serverless-output.yaml \
   --s3-bucket s3-bucket-name

aws s3 mb s3://bucket-name --region region

AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Resources:
  TestFunction:
    Type: AWS::Serverless::Function
    Properties:
      Handler: index.handler
      Runtime: nodejs6.10
      Environment:
        Variables: 
          S3_BUCKET: bucket-name

var AWS = require('aws-sdk');
     
exports.handler = function(event, context, callback) {  
  var bucketName = process.env.S3_BUCKET;       
  callback(null, bucketName);     
}