How do I add multiple network interfaces to an EC2 instance?

import * as pulumi from "@pulumi/pulumi";
import * as aws from "@pulumi/aws";

// Create a VPC
const vpc = new aws.ec2.Vpc("myVpc", {
    cidrBlock: "10.0.0.0/16",
});

// Create a subnet for the VPC
const subnet = new aws.ec2.Subnet("mySubnet", {
    vpcId: vpc.id,
    cidrBlock: "10.0.1.0/24",
});

// Create a security group
const securityGroup = new aws.ec2.SecurityGroup("mySecurityGroup", {
    vpcId: vpc.id,
    ingress: [
        { protocol: "tcp", fromPort: 22, toPort: 22, cidrBlocks: ["0.0.0.0/0"] }, // SSH
        { protocol: "tcp", fromPort: 80, toPort: 80, cidrBlocks: ["0.0.0.0/0"] }, // HTTP
    ],
    egress: [
        { protocol: "-1", fromPort: 0, toPort: 0, cidrBlocks: ["0.0.0.0/0"] }, // All outbound traffic
    ],
});

// Create the primary network interface
const primaryNetworkInterface = new aws.ec2.NetworkInterface("primaryNetworkInterface", {
    subnetId: subnet.id,
    privateIps: ["10.0.1.10"],
    securityGroups: [securityGroup.id],
});

// Create a secondary network interface
const secondaryNetworkInterface = new aws.ec2.NetworkInterface("secondaryNetworkInterface", {
    subnetId: subnet.id,
    privateIps: ["10.0.1.11"],
    securityGroups: [securityGroup.id],
});

// Create an EC2 instance and attach the primary network interface
const ec2Instance = new aws.ec2.Instance("myInstance", {
    instanceType: "t2.micro",
    ami: "ami-0c55b159cbfafe1f0", // Amazon Linux 2 AMI
    networkInterfaces: [{
        deviceIndex: 0,
        networkInterfaceId: primaryNetworkInterface.id,
    }],
});

// Attach the secondary network interface to the EC2 instance
const secondaryNetworkInterfaceAttachment = new aws.ec2.NetworkInterfaceAttachment("secondaryNetworkInterfaceAttachment", {
    instanceId: ec2Instance.id,
    networkInterfaceId: secondaryNetworkInterface.id,
    deviceIndex: 1,
});

export const instanceId = ec2Instance.id;
export const primaryNetworkInterfaceId = primaryNetworkInterface.id;
export const secondaryNetworkInterfaceId = secondaryNetworkInterface.id;