Tags using locals in Terraform

tags.tf

variable "labels" {
  description = "Labels to set for all resources"
  type        = map(string)
  default     = {}
}

## Locals

locals {
   required_labels = {
    managed-by  = "terraform",
    owner       = "bradley",
    environment = "production"
  }
  labels = merge(var.labels, local.required_labels)
}