feat: abstracted all domain instances away to the configuration files

terraform/routing.tf

@@ -1,12 +1,12 @@
 # The Route53 DNS zone.
 data "aws_route53_zone" "main" {
-  name = local.domain_name
+  name = var.domain
 }
 
 # Push all domain traffic through the reverse proxy.
 resource "aws_route53_record" "domain" {
   zone_id = data.aws_route53_zone.main.zone_id
-  name    = "git.${data.aws_route53_zone.main.name}"
+  name    = "${var.subdomain}.${data.aws_route53_zone.main.name}"
   type    = "A"
   ttl     = "60"
   records = [aws_eip.public.public_ip]