Tạo REST operation để GET product bằng ID

        // GET /products/{id}
        productIdResource.addMethod("GET", new Integration(
                IntegrationProps.builder()
                        .type(IntegrationType.HTTP_PROXY)
                        .integrationHttpMethod("GET")
                        .uri("http://" + apiStackProps.networkLoadBalancer().getLoadBalancerDnsName() +
                                ":8080/api/products/{id}")
                        .options(IntegrationOptions.builder()
                                .vpcLink(apiStackProps.vpcLink())
                                .connectionType(ConnectionType.VPC_LINK)
                                .requestParameters(productIdIntegrationParameters)
                                .build())
                        .build()), MethodOptions.builder()
                .requestParameters(productIdMethodParameters)
                .build());