add custom domain to frontend

terraform/modules/frontend/dns.tf

@@ -0,0 +1,39 @@
+// Specificly created for imo-msw preview environment
+// Can be removed or altered for other applications
+
+data "azurerm_dns_zone" "dns_zone" {
+  count               = var.app == "imo-msw" && var.env == "dev-preview"
+  name                = "imo-msw-dev.kystverket.cloud"
+  resource_group_name = data.azurerm_resource_group.rg-dns
+}
+
+resource "azurerm_dns_a_record" "frontend" {
+  count               = var.app == "imo-msw" && var.env == "dev-preview"
+  name                = "@"
+  zone_name           = data.azurerm_dns_zone.dns_zone.name
+  resource_group_name = var.resource_group_name
+  ttl                 = 3600
+  records             = azurerm_container_app.frontend.outbound_ip_addresses
+}
+
+resource "azurerm_dns_txt_record" "frontend" {
+  count               = var.app == "imo-msw" && var.env == "dev-preview"
+  name                = "asuid"
+  zone_name           = data.azurerm_dns_zone.dns_zone.name
+  resource_group_name = var.resource_group_name
+  ttl                 = 3600
+
+  record {
+    value = azurerm_container_app.frontend.custom_domain_verification_id
+  }
+}
+
+resource "azurerm_container_app_custom_domain" "frontend" {
+  count            = var.app == "imo-msw" && var.env == "dev-preview"
+  name             = trimprefix(azurerm_dns_txt_record.frontend.fqdn, "asuid.")
+  container_app_id = azurerm_container_app.frontend.id
+
+  lifecycle {
+    ignore_changes = [certificate_binding_type, container_app_environment_certificate_id]
+  }
+}