Configure

Create the following variable in your variables.tf:

variable "apps" {
  default = [ "www", "api", "blog", "shop", "cdn"]
}

Update

In your main.tf and with the use of the for expression, convert each app name above into a hostname by appending the example.com domain. The new local variable containing the new hostnames list can be named app_hostnames and we will use it in later exercises.

Output

Output the app_hostnames local to confirm the logic is applied.

Plan

Run terraform plan. You could run terraform apply too, but because we are not modifying any resources no changes will be applied anyway.

Commit

Commit your change and push it to GitHub.