Add Terraform configuration files for Cloud Run service deployment

terraform/providers.tf

@@ -0,0 +1,13 @@
+terraform {
+  required_providers {
+    google = {
+      source = "hashicorp/google"
+      version = "~>7.17.0"
+    }
+  }
+}
+
+provider "google" {
+  project = var.project_id
+  region  = var.default_region
+}