feat: estrutura inicial do gerenciador de subdomínios

- backend Express com endpoints Hostinger DNS API
- frontend React+Vite+Tailwind com card de API key
- docker-compose (frontend:3014, backend:8019, nginx:8021)
- Traefik label para subdominio.clube67.com

backend/server.js

@@ -0,0 +1,77 @@
+import express from 'express';
+import cors from 'cors';
+import { readFileSync, writeFileSync, existsSync } from 'fs';
+import { fileURLToPath } from 'url';
+import { dirname, join } from 'path';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const CONFIG_FILE = join(__dirname, 'config.json');
+
+const app = express();
+app.use(cors());
+app.use(express.json());
+
+function loadConfig() {
+  if (!existsSync(CONFIG_FILE)) return { hostinger_api_key: '' };
+  try { return JSON.parse(readFileSync(CONFIG_FILE, 'utf8')); } catch { return { hostinger_api_key: '' }; }
+}
+
+function saveConfig(data) {
+  writeFileSync(CONFIG_FILE, JSON.stringify(data, null, 2), 'utf8');
+}
+
+// GET configuração (mascara a key)
+app.get('/api/config', (req, res) => {
+  const cfg = loadConfig();
+  res.json({ has_api_key: !!cfg.hostinger_api_key });
+});
+
+// POST salvar API key da Hostinger
+app.post('/api/config/hostinger-key', (req, res) => {
+  const { api_key } = req.body;
+  if (!api_key?.trim()) return res.status(400).json({ error: 'api_key obrigatória' });
+  const cfg = loadConfig();
+  cfg.hostinger_api_key = api_key.trim();
+  saveConfig(cfg);
+  res.json({ ok: true });
+});
+
+// GET listar subdomínios via Hostinger API
+app.get('/api/subdomains', async (req, res) => {
+  const cfg = loadConfig();
+  if (!cfg.hostinger_api_key) return res.status(400).json({ error: 'API key não configurada' });
+
+  try {
+    const r = await fetch('https://developers.hostinger.com/api/dns/v1/domains', {
+      headers: { Authorization: `Bearer ${cfg.hostinger_api_key}`, 'Content-Type': 'application/json' }
+    });
+    const data = await r.json();
+    res.json(data);
+  } catch (e) {
+    res.status(500).json({ error: e.message });
+  }
+});
+
+// POST criar subdomínio no DNS da Hostinger
+app.post('/api/subdomains', async (req, res) => {
+  const cfg = loadConfig();
+  if (!cfg.hostinger_api_key) return res.status(400).json({ error: 'API key não configurada' });
+
+  const { domain, subdomain, type = 'A', value } = req.body;
+  if (!domain || !subdomain || !value) return res.status(400).json({ error: 'domain, subdomain e value obrigatórios' });
+
+  try {
+    const r = await fetch(`https://developers.hostinger.com/api/dns/v1/domains/${domain}/records`, {
+      method: 'POST',
+      headers: { Authorization: `Bearer ${cfg.hostinger_api_key}`, 'Content-Type': 'application/json' },
+      body: JSON.stringify({ type, name: subdomain, content: value, ttl: 300 })
+    });
+    const data = await r.json();
+    res.json(data);
+  } catch (e) {
+    res.status(500).json({ error: e.message });
+  }
+});
+
+const PORT = process.env.PORT || 8019;
+app.listen(PORT, () => console.log(`[subdominio-backend] porta ${PORT}`));