Make assign public IP default better

[dragonfleas]

Description

The assign_public_ip is set to false as the default for the ECS service resource. Since we primarily use Fargate containers which by default utilize (and require) the awsvpc network type also requiring the auto assign public IP to be true, we should change the default to be true, or make it a required variable. I'd opt for the former considering backwards compatibility.

Reference

terraform-aws-ecs-service/variables.tf

Lines 138 to 142 in cc9e62e

	variable "assign_public_ip" {
	type = bool
	description = "Whether or not to assign a public IP to the task"
	default = false
	}