terraform: Add app DNS entires

With nginx-ingress in place (or any other ingress-controller), this
patch provides the required DNS entires that can be used directly or as
part of a CNAME entry.

terraform/dns.tf

@@ -5,3 +5,20 @@ resource "cloudflare_record" "dns_a_api" {
   type    = "A"
   ttl     = 300
 }
+
+resource "cloudflare_record" "dns_a_apps" {
+  zone_id = var.dns_zone_id
+  name    = "apps.${var.dns_domain}"
+  value   = hcloud_load_balancer.lb.ipv4
+  type    = "A"
+  ttl     = 300
+}
+
+
+resource "cloudflare_record" "dns_a_apps_wildcard" {
+  zone_id = var.dns_zone_id
+  name    = "*.apps.${var.dns_domain}"
+  value   = hcloud_load_balancer.lb.ipv4
+  type    = "A"
+  ttl     = 300
+}