Add support for additional tags on VPC (#43)

main.tf

@@ -7,7 +7,7 @@ resource "aws_vpc" "this" {
   enable_dns_hostnames = "${var.enable_dns_hostnames}"
   enable_dns_support   = "${var.enable_dns_support}"
 
-  tags = "${merge(var.tags, map("Name", format("%s", var.name)))}"
+  tags = "${merge(var.tags, var.vpc_tags, map("Name", format("%s", var.name)))}"
 }
 
 ###################

variables.tf

@@ -100,6 +100,11 @@ variable "tags" {
   default     = {}
 }
 
+variable "vpc_tags" {
+  description = "Additional tags for the VPC"
+  default     = {}
+}
+
 variable "public_subnet_tags" {
   description = "Additional tags for the public subnets"
   default     = {}