Add section explaining Terraform images versioning

README.md

@@ -59,6 +59,14 @@ variable "CI_PROJECT_NAME" {
 
 If you commit the `.terraform.lock.hcl` file to your repository we recommend setting `TF_INIT_FLAGS` to `-lockfile=readonly` to prevent changes to the lockfile.
 
+## Terraform images versioning
+
+`terraform-images` are created for multiple Terraform versions. There are images available for Terraform version `1.1`, `1.2` and `1.3`. 
+All the images for the different versions are tagged with the `terraform-image` versoin. 
+For example, a the image version `v0.43.0` for Terraform `1.1` will bee named `/1.1:v0.43.0`, the same image version for Terraform `1.2` will name `/1.2:v0.43.0`
+
+To find available image for your version plese look at the projects [container regitry images marked as release](https://gitlab.com/gitlab-org/terraform-images/container_registry/?orderBy=UPDATED&sort=desc&search%5B%5D=releases&search%5B%5D=)
+
 # How to contribute?
 
 Contributions are always welcome. Don't be shy!