add homework 7.3, complete task 1

src/homework/07-terraform/7.3/terraform/provider.tf

@@ -0,0 +1,27 @@
+terraform {
+  required_providers {
+    yandex = {
+      source = "yandex-cloud/yandex"
+    }
+  }
+  required_version = ">= 0.13"
+
+  backend "s3" {
+    endpoint   = "storage.yandexcloud.net"
+    bucket     = "netology-tf-state"
+    region     = "ru-central1"
+    key        = "tf/default.tfstate"
+    access_key = "service_account_access_key_id"
+    secret_key = "service_account_access_key_secret"
+
+    skip_region_validation      = true
+    skip_credentials_validation = true
+  }
+}
+
+provider "yandex" {
+  token     = "auth_token_here"
+  cloud_id  = "cloud_id_here"
+  folder_id = "folder_id_here"
+  zone      = "ru-central1-a"
+}