How do I enable SSH access to instances within a private network?

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

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

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

// Create an Internet Gateway for the VPC
const igw = new aws.ec2.InternetGateway("my-igw", {
    vpcId: vpc.id,
});

// Create a route table for the subnet
const routeTable = new aws.ec2.RouteTable("my-route-table", {
    vpcId: vpc.id,
    routes: [
        {
            cidrBlock: "0.0.0.0/0",
            gatewayId: igw.id,
        },
    ],
});

// Associate the route table with the subnet
new aws.ec2.RouteTableAssociation("my-route-table-association", {
    subnetId: subnet.id,
    routeTableId: routeTable.id,
});

// Create a security group to allow SSH access
const sshSecurityGroup = new aws.ec2.SecurityGroup("ssh-security-group", {
    vpcId: vpc.id,
    ingress: [
        {
            protocol: "tcp",
            fromPort: 22,
            toPort: 22,
            cidrBlocks: ["0.0.0.0/0"], // Allowing SSH access from anywhere (for demonstration purposes)
        },
    ],
    egress: [
        {
            protocol: "-1",
            fromPort: 0,
            toPort: 0,
            cidrBlocks: ["0.0.0.0/0"],
        },
    ],
});

// Launch an EC2 instance within the subnet
const instance = new aws.ec2.Instance("my-instance", {
    instanceType: "t2.micro",
    ami: "ami-0c55b159cbfafe1f0", // Amazon Linux 2 AMI for demonstration purposes
    subnetId: subnet.id,
    vpcSecurityGroupIds: [sshSecurityGroup.id],
    keyName: "my-key-pair", // Ensure you have created this key pair in your AWS account
});

// Export the instance's public IP address
export const publicIp = instance.publicIp;
export const publicDns = instance.publicDns;