Parameters: DomainName: Type: String Default: example.com ACMCertificateArn: Type: String Default: cert-arn-in-us-east-1 Resources: MyFunction: Type: AWS::Serverless::Function Properties: InlineCode: | exports.handler = async (event) => { const response = { statusCode: 200, body: JSON.stringify('Hello from Lambda!'), }; return response; }; Handler: index.handler Runtime: nodejs12.x Events: Fetch: Type: Api Properties: RestApiId: !Ref MyApi Method: Post Path: /fetch MyApi: Type: AWS::Serverless::Api Properties: OpenApiVersion: 3.0.1 StageName: Prod Domain: DomainName: !Ref DomainName CertificateArn: !Ref ACMCertificateArn EndpointConfiguration: EDGE BasePath: - /one Route53: HostedZoneId: ZQ1UAL4EFZVME IpV6: true