feat: add full Zonemaster stack with Docker and Spanish UI

- Clone all 5 Zonemaster component repos (LDNS, Engine, CLI, Backend, GUI)
- Dockerfile.backend: 8-stage multi-stage build LDNS→Engine→CLI→Backend
- Dockerfile.gui: Astro static build served via nginx
- docker-compose.yml: backend (internal) + frontend (port 5353)
- nginx.conf: root redirects to /es/, /api/ proxied to backend
- zonemaster-gui/config.ts: defaultLanguage set to 'es' (Spanish)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

zonemaster-gui/e2e/FR10.e2e-spec.ts

@@ -0,0 +1,24 @@
+import { test, expect } from './global-setup';
+
+import { goToHome, clearBrowserCache } from './utils/app.utils';
+
+test.describe('Zonemaster test FR10 - [On launching the URL opens with a default simple view]', () => {
+  test.beforeEach(async ({ page }) => {
+    await goToHome(page);
+    await clearBrowserCache(page);
+  });
+
+  test('should have [Run domain test] label visible', async ({ page }) => {
+    await expect(page.locator('h1', { hasText: 'Check how your domain is doing'})).toBeVisible();
+  });
+
+  test('should have [Options] label visible and NOT selected', async ({ page }) => {
+    await expect(page.locator('#advanced-toggle-label', { hasText: 'Show options' })).toBeVisible();
+    await expect(page.locator('#advanced-toggle')).toHaveAttribute('aria-expanded', 'false');
+  });
+
+
+  test('should have options NOT visible', async ({ page }) => {
+      await expect(page.locator('#advanced-options')).toHaveAttribute('hidden');
+  });
+});