Feature/tailscale access (#1)

* AWS_R53_ENABLED: Delete unused variable

* Add Tailscale Feature
- Removed R53 configuration
- Updated Ansible playbook to handle empty variables
- Updated Ansible playbook to use variables file
- Updated README to include updated requirements

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Co-authored-by: Damien A <sepales.pret0h@icloud.com>

terraform/outputs.tf

@@ -1,7 +1,3 @@
 output "public_ip" {
   value = aws_instance.containerlab_host.public_ip
 }
-
-output "containerlab_fqdn" {
-  value = var.AWS_R53_ENABLED && length(aws_route53_record.containerlab_fqdn) > 0 ? "${aws_route53_record.containerlab_fqdn[0].name}.${data.aws_route53_zone.selected.name}" : ""
-}