Add domain validation record

cidv2.tf

@@ -1,6 +1,6 @@
 # CNAME for custom domain for expirimental fly.io deployment.
 # https://fly.io/docs/networking/custom-domain/
-resource "aws_route53_record" "experimental_api" {
+resource "aws_route53_record" "fly_experimental_api" {
   zone_id = data.aws_route53_zone.imagedirectory_cloud.zone_id
   name    = "api"
   type    = "CNAME"
@@ -13,5 +13,22 @@ resource "aws_route53_record" "experimental_api" {
     create_before_destroy = true
   }
 
+  ttl = "3600"
+}
+
+# Domain validation record for fly.io certificate.
+resource "aws_route53_record" "flyio_domain_validation" {
+  zone_id = data.aws_route53_zone.imagedirectory_cloud.zone_id
+  name    = "_acme-challenge.api"
+  type    = "CNAME"
+
+  records = [
+    "api.imagedirectory.cloud.rgdx8e.flydns.net",
+  ]
+
+  lifecycle {
+    create_before_destroy = true
+  }
+
   ttl = "3600"
 }