werckerで複数の環境にdeployする ref: http://qiita.com/hotakasaito/items/d9d199b09760a0d6fff3

file0.yml

deploy:
  steps:
    - hotakasaito/elastic-beanstalk-deploy:
        key: $AWS_ACCESS_KEY_ID
        secret: $AWS_SECRET_KEY
        app_name: app01
        env_name: stg
        region: ap-northeast-1

file1.yml

deploy:
  staging:
    - hotakasaito/elastic-beanstalk-deploy:
        key: $AWS_ACCESS_KEY_ID
        secret: $AWS_SECRET_KEY
        app_name: app01
        env_name: stg
        region: ap-northeast-1

  staging-us:
    - hotakasaito/elastic-beanstalk-deploy:
        key: $AWS_ACCESS_KEY_ID
        secret: $AWS_SECRET_KEY
        app_name: app01
        env_name: stg-us
        region: us-east-1