Fixed minimum terraform provider versions and replaced deprecated functions

Author: lucassrg

compute.tf

@@ -30,10 +30,10 @@ resource "oci_core_instance" "simple-vm" {
 
   metadata = {
     ssh_authorized_keys = var.ssh_public_key
-    user_data = base64encode(join("\n", list(
+    user_data = base64encode(join("\n", tolist([
       "#!/usr/bin/env bash",
       "set -x",
-      (data.template_file.install_runner_ol.rendered),
+      (data.template_file.install_runner_ol.rendered)],
     )))
   }
 

provider.tf

@@ -1,12 +1,3 @@
-terraform {
-  required_version = "~> 0.12"
-  required_providers {
-    oci = {
-      version = ">= 3.27"
-    }
-  }
-}
-
 provider "oci" {
   tenancy_ocid     = var.tenancy_ocid
   user_ocid        = var.user_ocid

versions.tf

@@ -1,4 +1,14 @@
-
 terraform {
-  required_version = ">= 0.12"
+
+  required_version = ">= 0.14"
+
+  required_providers {
+    oci = {
+      version = ">= 4.24"
+    }
+    template = {
+      version = ">= 2.2"
+    }
+
+  }
 }