Created gks.tf and vpc.tf

cloud/gcp/gks.tf

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+variable "gke_num_nodes" {
+    type = number 
+    default = "1"
+    description = "number of gke nodes"
+}
+
+#GKE CLUSTER
+resource "google_container_cluster" "biot" {
+    name     = "${var.gcp_project_id}-gke"
+    location = var.gcp_region
+
+  # We can't create a cluster with no node pool defined, but we want to only use
+  # separately managed node pools. So we create the smallest possible default
+  # node pool and immediately delete it.
+
+  remove_default_node_pool = true
+  initial_node_count       = 1
+}
+
+# Separately Managed Node Pool
+resource "google_container_node_pool" "node_pool" {
+  name       = "${var.gcp_project_id}-node-pool"
+  location   = var.gcp_region
+  cluster    = var.gcp_project_id
+  node_count = var.gke_num_nodes
+
+  node_config {
+    preemptible  = true
+    machine_type = "e2-medium"
+  }
+}

cloud/gcp/vpc.tf

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+variable "gcp_vpc_name" {
+    type = string
+    description = "vpc name"
+}
+
+# VPC
+resource "google_compute_network" "vpc" {
+  name                    = "${var.gcp_vpc_name}-vpc"
+  auto_create_subnetworks = "false"
+}
+
+# Subnet
+resource "google_compute_subnetwork" "subnet" {
+  name          = "${var.gcp_vpc_name}-subnet"
+  region        = var.gcp_region
+  network       = google_compute_network.vpc.name
+  ip_cidr_range = "10.10.0.0/24"
+}