lambda-integration-serverless.yml

functions:
  hello:
    handler: handler.hello
    events:
      - http:
          path: users
          method: get
          integration: lambda  
          request:
            template:
              text/xhtml: '{ "stage" : "$context.stage" }'
              application/json: '{ "httpMethod" : "$context.httpMethod" }'
          response:
            headers:
              Access-Control-Allow-Origin: "'*'"
            statusCodes:
              400:
                pattern: '.*wrong.*'
                template:
                  application/json: >
                    #set ($errorMessageObj = $input.path('$.errorMessage'))
                    $errorMessageObj