fix: use wiremock.local alias to pass URL validation in webhook tests

The govalidator URL regex requires at least one dot in the hostname.
Use a Docker network alias 'wiremock.local' for webhook URLs so they
pass validation and remain reachable from the API container.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: AchoArnold

tests/docker-compose.yml

@@ -31,6 +31,10 @@ services:
       - "8080:8080"
     volumes:
       - ./wiremock/mappings:/home/wiremock/mappings:ro
+    networks:
+      default:
+        aliases:
+          - wiremock.local
     healthcheck:
       test: ["CMD", "curl", "-f", "http://localhost:8080/__admin/health"]
       interval: 5s

tests/helpers_test.go

@@ -22,9 +22,10 @@ import (
 )
 
 const (
-	apiBaseURL  = "http://localhost:8000"
-	wiremockURL = "http://localhost:8080"
-	userAPIKey  = "test-user-api-key"
+	apiBaseURL         = "http://localhost:8000"
+	wiremockURL        = "http://localhost:8080"
+	wiremockWebhookURL = "http://wiremock.local:8080" // reachable from API container, passes URL validation (needs a dot)
+	userAPIKey         = "test-user-api-key"
 )
 
 type testPhone struct {
@@ -119,7 +120,7 @@ func setupWebhook(ctx context.Context, t *testing.T, phoneNumber string, events
 
 	signingKey = randomEncryptionKey()
 	webhookPath = "/webhooks/" + uuid.New().String()
-	webhookURL := wiremockURL + webhookPath
+	webhookURL := wiremockWebhookURL + webhookPath
 
 	client := newAPIClient()
 	_, resp, err := client.Webhooks.Store(ctx, &httpsms.WebhookStoreParams{