diff --git a/terraform/atlas.tf b/terraform/atlas.tf
index 3013b06..bc93945 100644
--- a/terraform/atlas.tf
+++ b/terraform/atlas.tf
@@ -1,3 +1,7 @@
+# The terraform code in this repo is based on the official tutorial from the following link
+# https://cloud.google.com/blog/topics/developers-practitioners/easy-deployment-mean-stack-w-mongodb-atlas-cloud-run-and-hashicorp-terraform
+# The rest of the steps can be followed up from there.
+
 provider "mongodbatlas" {
   public_key  = var.atlas_pub_key
   private_key = var.atlas_priv_key
diff --git a/terraform/ci-cd.tf b/terraform/ci-cd.tf
index 3517714..2152f30 100644
--- a/terraform/ci-cd.tf
+++ b/terraform/ci-cd.tf
@@ -1,3 +1,6 @@
+# The terraform code in this repo is based on the official tutorial from the following link
+# https://cloud.google.com/blog/topics/developers-practitioners/easy-deployment-mean-stack-w-mongodb-atlas-cloud-run-and-hashicorp-terraform
+# The rest of the steps can be followed up from there.
 resource "google_project_service" "ci_cd" {
   project = google_project.prj.name
   service = "${each.value}.googleapis.com"
diff --git a/terraform/google.tf b/terraform/google.tf
index b92a55d..dd357c7 100644
--- a/terraform/google.tf
+++ b/terraform/google.tf
@@ -1,3 +1,7 @@
+# The terraform code in this repo is based on the official tutorial from the following link
+# https://cloud.google.com/blog/topics/developers-practitioners/easy-deployment-mean-stack-w-mongodb-atlas-cloud-run-and-hashicorp-terraform
+# The rest of the steps can be followed up from there.
+
 provider "google" {}
 
 resource "google_project" "prj" {
diff --git a/terraform/main.tf b/terraform/main.tf
index c269713..566542e 100644
--- a/terraform/main.tf
+++ b/terraform/main.tf
@@ -1,3 +1,7 @@
+# The terraform code in this repo is based on the official tutorial from the following link
+# https://cloud.google.com/blog/topics/developers-practitioners/easy-deployment-mean-stack-w-mongodb-atlas-cloud-run-and-hashicorp-terraform
+# The rest of the steps can be followed up from there.
+
 ###-----------------------------------------------------------------------------
 ### configure terraform
 ###-----------------------------------------------------------------------------
diff --git a/terraform/outputs.tf b/terraform/outputs.tf
index d7beaa7..e7c6cbd 100644
--- a/terraform/outputs.tf
+++ b/terraform/outputs.tf
@@ -1,3 +1,7 @@
+# The terraform code in this repo is based on the official tutorial from the following link
+# https://cloud.google.com/blog/topics/developers-practitioners/easy-deployment-mean-stack-w-mongodb-atlas-cloud-run-and-hashicorp-terraform
+# The rest of the steps can be followed up from there.
+
 output "app_url" {
   value = google_cloud_run_service.app.status[0].url
 }
diff --git a/terraform/variables.tf b/terraform/variables.tf
index 4c59fc2..6e9580f 100644
--- a/terraform/variables.tf
+++ b/terraform/variables.tf
@@ -1,3 +1,7 @@
+# The terraform code in this repo is based on the official tutorial from the following link
+# https://cloud.google.com/blog/topics/developers-practitioners/easy-deployment-mean-stack-w-mongodb-atlas-cloud-run-and-hashicorp-terraform
+# The rest of the steps can be followed up from there.
+
 ###-----------------------------------------------------------------------------
 ### general config
 ###-----------------------------------------------------------------------------