$ npm install -g aws-cdk


$ mkdir hello-cdk
$ cd hello-cdk
$ cdk init app --language=typescript


$ touch lib/hello-cdk-base.ts


$ npm install --save @aws-cdk/aws-ec2


{
  "app": "node bin/hello-cdk.js"
}


this.getContext('cidr_by_env')[`${env}`]
this.getContext('max_azs')[`${env}`]


cdk -c VAR=value


cdk -c VAR1=value1 -c VAR2=value2


$ mkdir -p "./cft/qa"
$ cdk synth -c ENV=qa "HelloCdkBase-qa" >./cft/qa/vpc.yml


$ npm run build
$ cdk deploy -c ENV=qa


$ cdk destroy -c ENV=qa