First pass at setting up GCP deploy config as infrastructure

- Terraform config files to setup cluster, deployments and services
  - Adds only Searxng deployment and test service in this commit

- Makefile to:
  - Build and push images
  - Run terraform with correct project configuration

- Env file template to help setting .env file with project configs

deploy/gcp/gke-cluster/main.tf

@@ -0,0 +1,59 @@
+terraform {
+  required_providers {
+    google = {
+      source = "hashicorp/google"
+      version = "5.28.0"
+    }
+  }
+}
+
+variable "project_id" {
+  description = "The ID of the project in which resources will be deployed."
+  type        = string
+}
+
+variable "name" {
+  description = "The GKE Cluster name"
+  type        = string
+}
+
+variable "region" {
+  description = "The GCP region to deploy to."
+  type        = string
+}
+
+variable "key_file" {
+  description = "The path to the GCP service account key file."
+  type        = string
+}
+
+provider "google" {
+  credentials = file(var.key_file)
+  project     = var.project_id
+  region      = var.region
+}
+
+resource "google_container_cluster" "cluster" {
+  name               = var.name
+  location           = var.region
+  initial_node_count = 1
+  remove_default_node_pool = true
+}
+
+resource "google_container_node_pool" "primary_preemptible_nodes" {
+  name       = "${google_container_cluster.cluster.name}-node-pool"
+  location   = var.region
+  cluster    = google_container_cluster.cluster.name
+  node_count = 1
+
+  node_config {
+    machine_type = "n1-standard-4"
+    disk_size_gb = 25
+    spot = true
+    oauth_scopes = [
+      "https://www.googleapis.com/auth/devstorage.read_only",
+      "https://www.googleapis.com/auth/logging.write",
+      "https://www.googleapis.com/auth/monitoring",
+    ]
+  }
+}