Add missing code from final chapter

Author: brikis98

code/terraform/08-terraform-team/examples/alb/README.md

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+# ALB example
+
+This folder contains a [Terraform](https://www.terraform.io/) configuration that shows an example of how to 
+use the [alb module](../../modules/networking/alb) to deploy a load balancer 
+(using [ELB](https://aws.amazon.com/elasticloadbalancing/)) in an [Amazon Web Services (AWS) 
+account](http://aws.amazon.com/). 
+
+For more info, please see Chapter 8, "How to use Terraform as a Team", of 
+*[Terraform: Up and Running](http://www.terraformupandrunning.com)*.
+
+## Pre-requisites
+
+* You must have [Terraform](https://www.terraform.io/) installed on your computer. 
+* You must have an [Amazon Web Services (AWS) account](http://aws.amazon.com/).
+
+Please note that this code was written for Terraform 0.12.x.
+
+## Quick start
+
+**Please note that this example will deploy real resources into your AWS account. We have made every effort to ensure 
+all the resources qualify for the [AWS Free Tier](https://aws.amazon.com/free/), but we are not responsible for any
+charges you may incur.** 
+
+Configure your [AWS access 
+keys](http://docs.aws.amazon.com/general/latest/gr/aws-sec-cred-types.html#access-keys-and-secret-access-keys) as 
+environment variables:
+
+```
+export AWS_ACCESS_KEY_ID=(your access key id)
+export AWS_SECRET_ACCESS_KEY=(your secret access key)
+```
+
+Deploy the code:
+
+```
+terraform init
+terraform apply
+```
+
+Clean up when you're done:
+
+```
+terraform destroy
+```

code/terraform/08-terraform-team/examples/alb/dependencies.tf

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+data "aws_vpc" "default" {
+  default = true
+}
+
+data "aws_subnet_ids" "default" {
+  vpc_id = data.aws_vpc.default.id
+}

code/terraform/08-terraform-team/examples/alb/main.tf

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+terraform {
+  required_version = ">= 0.12, < 0.13"
+}
+
+provider "aws" {
+  region = "us-east-2"
+
+  # Allow any 2.x version of the AWS provider
+  version = "~> 2.0"
+}
+
+module "alb" {
+  source = "../../modules/networking/alb"
+
+  alb_name   = var.alb_name
+
+  subnet_ids = data.aws_subnet_ids.default.ids
+}

code/terraform/08-terraform-team/examples/alb/outputs.tf

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+output "alb_dns_name" {
+  value       = module.alb.alb_dns_name
+  description = "The domain name of the load balancer"
+}

code/terraform/08-terraform-team/examples/alb/variables.tf

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+# ---------------------------------------------------------------------------------------------------------------------
+# OPTIONAL PARAMETERS
+# These parameters have reasonable defaults.
+# ---------------------------------------------------------------------------------------------------------------------
+
+variable "alb_name" {
+  description = "The name of the ALB and all its resources"
+  type        = string
+  default     = "terraform-up-and-running"
+}

code/terraform/08-terraform-team/examples/asg/README.md

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+# ASG example
+
+This folder contains a [Terraform](https://www.terraform.io/) configuration that shows an example of how to 
+use the [asg-rolling-deploy module](../../modules/cluster/asg-rolling-deploy) to deploy a cluster of web servers 
+(using [EC2](https://aws.amazon.com/ec2/) and [Auto Scaling](https://aws.amazon.com/autoscaling/)) in an 
+[Amazon Web Services (AWS) account](http://aws.amazon.com/). 
+
+For more info, please see Chapter 8, "How to use Terraform as a Team", of 
+*[Terraform: Up and Running](http://www.terraformupandrunning.com)*.
+
+## Pre-requisites
+
+* You must have [Terraform](https://www.terraform.io/) installed on your computer. 
+* You must have an [Amazon Web Services (AWS) account](http://aws.amazon.com/).
+
+Please note that this code was written for Terraform 0.12.x.
+
+## Quick start
+
+**Please note that this example will deploy real resources into your AWS account. We have made every effort to ensure 
+all the resources qualify for the [AWS Free Tier](https://aws.amazon.com/free/), but we are not responsible for any
+charges you may incur.** 
+
+Configure your [AWS access 
+keys](http://docs.aws.amazon.com/general/latest/gr/aws-sec-cred-types.html#access-keys-and-secret-access-keys) as 
+environment variables:
+
+```
+export AWS_ACCESS_KEY_ID=(your access key id)
+export AWS_SECRET_ACCESS_KEY=(your secret access key)
+```
+
+Deploy the code:
+
+```
+terraform init
+terraform apply
+```
+
+Clean up when you're done:
+
+```
+terraform destroy
+```

code/terraform/08-terraform-team/examples/asg/dependencies.tf

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+data "aws_vpc" "default" {
+  default = true
+}
+
+data "aws_subnet_ids" "default" {
+  vpc_id = data.aws_vpc.default.id
+}

code/terraform/08-terraform-team/examples/asg/main.tf

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+terraform {
+  required_version = ">= 0.12, < 0.13"
+}
+
+provider "aws" {
+  region = "us-east-2"
+
+  # Allow any 2.x version of the AWS provider
+  version = "~> 2.0"
+}
+
+module "asg" {
+  source = "../../modules/cluster/asg-rolling-deploy"
+
+  cluster_name  = var.cluster_name
+
+  ami           = "ami-0c55b159cbfafe1f0"
+  instance_type = "t2.micro"
+
+  min_size           = 1
+  max_size           = 1
+  enable_autoscaling = false
+
+  subnet_ids        = data.aws_subnet_ids.default.ids
+}

code/terraform/08-terraform-team/examples/asg/outputs.tf

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+output "asg_name" {
+  value       = module.asg.asg_name
+  description = "The name of the Auto Scaling Group"
+}

code/terraform/08-terraform-team/examples/asg/variables.tf

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+# ---------------------------------------------------------------------------------------------------------------------
+# OPTIONAL PARAMETERS
+# These parameters have reasonable defaults.
+# ---------------------------------------------------------------------------------------------------------------------
+
+variable "cluster_name" {
+  description = "The name of the ASG and all its resources"
+  type        = string
+  default     = "terraform-up-and-running"
+}