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/scripts/create_release.js

@@ -0,0 +1,51 @@
+import fs from 'fs';
+import path from 'path';
+import archiver from 'archiver';
+import { readFileSync } from 'fs';
+
+// Read package.json to get version
+const packageJson = JSON.parse(
+  readFileSync(new URL('../package.json', import.meta.url))
+);
+
+export async function zipDirectory(sourceDir, outPath) {
+    const output = fs.createWriteStream(outPath);
+    const archive = archiver('zip', {
+        zlib: { level: 9 }
+    });
+
+    return new Promise((resolve, reject) => {
+        output.on('close', () => {
+            console.log(`Zipped ${archive.pointer()} total bytes`);
+            resolve();
+        });
+
+        archive.on('error', err => reject(err));
+
+        archive.pipe(output);
+        archive.directory(sourceDir, false); // `false` keeps only folder contents
+        archive.finalize();
+    });
+}
+
+// Example usage
+const __dirname = path.dirname(new URL(import.meta.url).pathname);
+const inputDir = path.resolve(__dirname, '../public');
+const version = packageJson.version;
+const outputZip = path.resolve(__dirname, `../zonemaster_web_gui_${version}.zip`);
+
+// Copy zonemaster.conf-example into public
+const file1Src = path.resolve(__dirname, '../zonemaster.conf-example');
+const file1Dest = path.resolve(inputDir, 'zonemaster.conf-example');
+fs.copyFileSync(file1Src, file1Dest);
+console.log('Include zonemaster.conf-example in distribution zip file');
+
+// Copy LICENSE into public
+const file2Src = path.resolve(__dirname, '../LICENSE');
+const file2Dest = path.resolve(inputDir, 'LICENSE');
+fs.copyFileSync(file2Src, file2Dest);
+console.log('Include LICENSE in distribution zip file');
+
+zipDirectory(inputDir, outputZip)
+    .then(() => console.log('Zip complete'))
+    .catch(err => console.error('Error zipping:', err));