Creates a VPC, two private subnets in two availability zones and one public subnet.
module "vpc" {
source = "./modules/vpc"
cidr_block = "10.0.0.0/24"
private_subnet_cidrs = ["10.0.0.0/28", "10.0.0.16/28"]
public_subnet_cidr = "10.0.0.32/28"
}