Fix warnings in iac-core + update tf and tf provider versions

Author: rufer7

README.md

@@ -30,13 +30,13 @@ Check out my blog post about this topic
    az login -t [AZURE_TENANT_ID]
    cd [PATH_TO_REPOSITORY]\iac-core
    terraform init
-   terraform apply --var-file=.\vars\dev.core.tfvars --state=dev.core.tfstate
+   terraform apply --var-file=.\vars\dev.core.tfvars
    ```
 
 ### Deploy application resources
 
 > [!IMPORTANT]
-> To generate deployment credentials and to configure the GitHub secrets for the GitHub actions workflow, see [here](https://learn.microsoft.com/en-us/azure/app-service/deploy-github-actions?tabs=openid%2Caspnetcore&WT.mc_id=MVP_344197#set-up-a-github-actions-workflow-manually).
+> To generate deployment credentials and to configure the secrets for the GitHub actions workflow, see [here](https://learn.microsoft.com/en-us/azure/app-service/deploy-github-actions?tabs=openid%2Caspnetcore&WT.mc_id=MVP_344197#set-up-a-github-actions-workflow-manually).
 > There are currently two GitHub environments set up for this repository: `dev` and `dev-iac`.
 > For both of them a separate federated credential is set up in the Entra app which got created while generating deployment credentials.
 > Furthermore the service principal of the Entra app is a member of the Entra group `kv-secret-rotation-sample-contributor-iac` and the following Microsoft Graph application permissions got added

iac-core/.terraform.lock.hcl

@@ -0,0 +1,5 @@
+terraform {
+  backend "local" {
+    path = "dev.core.tfstate"
+  }
+}

iac-core/backend.tf

@@ -1,7 +1,7 @@
 data "azurerm_client_config" "current" {}
 
 locals {
-  name_template       = "${var.resource_prefix}-<service>-iac"
+  name_template = "${var.resource_prefix}-<service>-iac"
 }
 
 # Resource Group
@@ -35,8 +35,8 @@ resource "azurerm_storage_account" "sa" {
 
 # container iac-state
 resource "azurerm_storage_container" "tfstate" {
-  name                 = "tfstate"
-  storage_account_name = azurerm_storage_account.sa.name
+  name               = "tfstate"
+  storage_account_id = azurerm_storage_account.sa.id
 }
 
 resource "azurerm_role_assignment" "blob-data-owner" {

iac-core/main.tf

@@ -1,13 +1,13 @@
 terraform {
-  required_version = "~> 1.9.8"
+  required_version = "~> 1.13.3"
   required_providers {
     azuread = {
       source  = "hashicorp/azuread"
-      version = "~> 3.0.2"
+      version = "~> 3.6.0"
     }
     azurerm = {
       source  = "hashicorp/azurerm"
-      version = "~> 4.7.0"
+      version = "~> 4.49.0"
     }
   }
 }