Update README.md

Author: KwokHing

README.md

@@ -37,3 +37,75 @@ variable "project_id" {
 }
 ```
 Add the following to the _main.tf_ file:
+```
+terraform {
+  required_providers {
+    google = {
+      source = "hashicorp/google"
+      version = "3.55.0"
+    }
+  }
+}
+
+provider "google" {
+  project     = var.project_id
+  region      = var.region
+  zone        = var.zone
+}
+
+
+module "instances" {
+  source     = "./modules/instances"
+}
+```
+Run "_terraform init_" in Cloud Shell in the root directory to initialize terraform.
+```
+terraform init
+```
+TASK 1: Import infrastructure <br/>
+Navigate to _Compute Engine > VM Instances_. Click on _tf-instance-1_. Copy the _Instance ID_ down somewhere to use later. <br/>
+Navigate to _Compute Engine > VM Instances_. Click on _tf-instance-2_. Copy the _Instance ID_ down somewhere to use later. <br/>
+Next, navigate to _modules/instances/instances.tf_. Copy the following configuration into the file:
+```
+resource "google_compute_instance" "tf-instance-1" {
+  name         = "tf-instance-1"
+  machine_type = "n1-standard-1"
+
+  boot_disk {
+    initialize_params {
+      image = "debian-cloud/debian-10"
+    }
+  }
+
+  network_interface {
+ network = "default"
+  }
+
+metadata_startup_script = <<-EOT
+#!/bin/bash
+EOT
+
+allow_stopping_for_update = true
+}
+
+resource "google_compute_instance" "tf-instance-2" {
+  name         = "tf-instance-2"
+  machine_type = "n1-standard-1"
+
+  boot_disk {
+    initialize_params {
+      image = "debian-cloud/debian-10"
+    }
+  }
+
+  network_interface {
+ network = "default"
+  }
+
+metadata_startup_script = <<-EOT
+#!/bin/bash
+EOT
+
+allow_stopping_for_update = true
+}
+```