add terraform remote backend

terraform/.terraform.lock.hcl

@@ -0,0 +1,19 @@
+# This file is maintained automatically by "terraform init".
+# Manual edits may be lost in future updates.
+
+provider "registry.terraform.io/hashicorp/aws" {
+  version = "3.22.0"
+  hashes = [
+    "h1:f/Tz8zv1Zb78ZaiyJkQ0MGIViZwbYrLuQk3kojPM91c=",
+    "zh:4a9a66caf1964cdd3b61fb3ebb0da417195a5529cb8e496f266b0778335d11c8",
+    "zh:514f2f006ae68db715d86781673faf9483292deab235c7402ff306e0e92ea11a",
+    "zh:5277b61109fddb9011728f6650ef01a639a0590aeffe34ed7de7ba10d0c31803",
+    "zh:67784dc8c8375ab37103eea1258c3334ee92be6de033c2b37e3a2a65d0005142",
+    "zh:76d4c8be2ca4a3294fb51fb58de1fe03361d3bc403820270cc8e71a04c5fa806",
+    "zh:8f90b1cfdcf6e8fb1a9d0382ecaa5056a3a84c94e313fbf9e92c89de271cdede",
+    "zh:d0ac346519d0df124df89be2d803eb53f373434890f6ee3fb37112802f9eac59",
+    "zh:d6256feedada82cbfb3b1dd6dd9ad02048f23120ab50e6146a541cb11a108cc1",
+    "zh:db2fe0d2e77c02e9a74e1ed694aa352295a50283f9a1cf896e5be252af14e9f4",
+    "zh:eda61e889b579bd90046939a5b40cf5dc9031fb5a819fc3e4667a78bd432bdb2",
+  ]
+}

terraform/main.tf

@@ -1,3 +1,12 @@
+terraform {
+    required_version = ">= 0.12"
+    backend "s3" {
+        bucket = "myapp-bucket"
+        key = "myapp/state.tfstate"
+        region = "eu-west-3"
+    }
+}
+
 provider "aws" {
     region = var.region
 }