composer.config

commands:
  01updateComposer:
    command: export COMPOSER_HOME=/root && /usr/bin/composer.phar self-update
  02installVendors:
    command: /usr/bin/composer.phar install

option_settings:
  - namespace: aws:elasticbeanstalk:application:environment
    option_name: COMPOSER_HOME
    value: /root

composer.json

{
	"require": {
		"aws/aws-sdk-php": "2.*",
		"filp/whoops": "1.*",
		"gregwar/image": "*",
		"fightbulc/moment": "1.2.*",
		"stripe/stripe-php": "dev-master"
	},
	"config": {
		"bin-dir": "bin"
	},
	"autoload": {
		"classmap": [
			"application/libraries",
			"application/modules",
			"application/models"
		]
	}
}