How do I configure a Kubernetes networking.istio.io gateway?

import * as pulumi from "@pulumi/pulumi";
import * as k8s from "@pulumi/kubernetes";

// Define the namespace for Istio resources
const istioNamespace = new k8s.core.v1.Namespace("istio-system", {
    metadata: {
        name: "istio-system",
    },
});

// Define the Gateway resource
const istioGateway = new k8s.apiextensions.CustomResource("istio-gateway", {
    apiVersion: "networking.istio.io/v1alpha3",
    kind: "Gateway",
    metadata: {
        namespace: istioNamespace.metadata.name,
        name: "my-istio-gateway",
    },
    spec: {
        selector: {
            istio: "ingressgateway", // use istio ingress gateway
        },
        servers: [
            {
                port: {
                    number: 80,
                    name: "http",
                    protocol: "HTTP",
                },
                hosts: ["*"],
            },
        ],
    },
});

export const gatewayName = istioGateway.metadata.name;
export const gatewayNamespace = istioGateway.metadata.namespace;