fix: clarify readme

Author: bendehaan

aws/README.md

@@ -42,7 +42,7 @@ The terraform code is loosely based on [this EKS managed Node Group TF example](
 
 1. export your AWS credentials (`export AWS_PROFILE=awsuser`)
 2. check whether you have the right profile by doing `aws sts get-caller-identity`. Make sure you have the right account and have the rights to do this.
-3. Ensure you have set all the right variables in `terraform.tfvars`. If you want to use a custom domain with TLS, also fill out your domain name(s) and Route53 hosted zone here. Delegate (sub)domains to Route53 nameservers if you're not hosting your domain with Route53: [using the AWS docs](https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/CreatingNewSubdomain.html)
+3. Ensure you have set all the right variables in `terraform.tfvars`. **Optional:** If you want to use a custom domain with TLS, also fill out your domain name(s) and Route53 hosted zone here. Delegate (sub)domains to Route53 nameservers if you're not hosting your domain with Route53: [using the AWS docs](https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/CreatingNewSubdomain.html)
 4. Do `terraform init` (if required, use tfenv to select TF 0.14.0 or higher )
 5. The bucket ARN will be asked in the next 2 steps. Take the one provided to you in the output earlier (e.g., `arn:aws:s3:::terraform-20230102231352749300000001`).
 6. Do `terraform plan`

aws/terraform.tfvars

@@ -1,7 +1,7 @@
 region = "eu-west-1"
 # state_bucket_arn = "..."
 
-## Use this section for a custom domain with TLS
+## Optional: use this section for a custom domain with TLS. If you leave it blank, you'll just get the default ALB urls
 # hosted_zone_id      = "..."
 # balancer_domain_name = "..."
 # ctfd_domain_name     = "..."