load balancer listening on one port but routing to a different port with Pulumi and AWS crosswalk

index.ts

const alb = new awsx.lb.ApplicationLoadBalancer("loadbalancer", {
  defaultTargetGroup: {
    port: 3000,
    healthCheck: { // optional
      port: "3000",
    },
  },
  listener: {
    port: 80,
  },
});