Terragrunt cloud builder
This builder can be used to run the terragrunt tool in the GCE. Terragrunt product page is a wrapper for Terraform product page:
To build this builder, run the following command in this directory.
$ gcloud builds submit --config=cloudbuild.yaml
Terragrunt builder is based on Terraform builder link. Most of the details about backend are the same as for terraform. Please check examples for the differences and example configuration link