How do I configure a GCP monitoring alert policy?

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

// Define a notification channel
const notificationChannel = new gcp.monitoring.NotificationChannel("exampleChannel", {
    displayName: "Example Notification Channel",
    type: "email",
    labels: {
        email_address: "example@example.com",
    },
});

// Define an alert policy
const alertPolicy = new gcp.monitoring.AlertPolicy("exampleAlertPolicy", {
    displayName: "Example Alert Policy",
    combiner: "OR",
    conditions: [{
        displayName: "Example Condition",
        conditionThreshold: {
            filter: "metric.type=\"compute.googleapis.com/instance/cpu/utilization\" AND resource.type=\"gce_instance\"",
            comparison: "COMPARISON_GT",
            thresholdValue: 0.8,
            duration: "60s",
            aggregations: [{
                alignmentPeriod: "60s",
                perSeriesAligner: "ALIGN_MEAN",
            }],
        },
    }],
    notificationChannels: [notificationChannel.id],
    documentation: {
        content: "This alert is triggered when the CPU utilization exceeds 80%.",
        mimeType: "text/markdown",
    },
    alertStrategy: {
        notificationRateLimit: {
            period: "3600s",
        },
    },
    enabled: true,
});