serverless.yml

# serverless.yml
#test
service: crud-demo

provider:
  name: aws
  apiKeys:
    - ${env:MY_API_KEY}
  usagePlan:
    quota:
      limit: 50 #The maximum number of requests that can be made in a given time period.
      offset: 2 #The number of requests subtracted from the given limit in the initial time period.
      period: MONTH #The time period in which the limit applies. Valid values are "DAY", "WEEK" or "MONTH".
    throttle:
      burstLimit: 10 #The maximum API request rate limit over a time ranging from one to a few seconds. The maximum API request rate limit depends on whether the underlying token bucket is at its full capacity. 
      rateLimit: 10 #The API request steady-state rate limit (average requests per second over an extended period of time)
  runtime: nodejs8.10
  stage: dev
  region: ap-south-1

  vpc:
    securityGroupIds:
      - "<security group ID>"
    subnetIds:
      - "<subnet ID>"

functions:
  app:
    handler: app.handler # reference the file and exported method
    CodeUri: ./
    events: # this is an API Gateway HTTP event trigger
      - http:
          path: /
          method: ANY
          cors: true
          private: true
      - http: # all routes get proxied to the Express router
          path: /{proxy+}
          method: ANY
          cors: true
          private: true