diff --git a/backend/index.js b/backend/index.js
index 552bf31..46df592 100644
--- a/backend/index.js
+++ b/backend/index.js
@@ -41,6 +41,10 @@ const initDB = async () => {
         
         await pool.query(`ALTER TABLE orders ADD COLUMN IF NOT EXISTS pedido_id VARCHAR(100);`).catch(() => {});
         
+        await pool.query(`CREATE UNIQUE INDEX IF NOT EXISTS unique_order_product ON orders (pedido_id, produto_id);`).catch(err => {
+            console.error("Notice: Could not create unique index (might already exist or there are duplicates):", err.message);
+        });
+        
         console.log("Database initialized successfully.");
     } catch (err) {
         console.error("Failed to initialize database:", err);
@@ -159,6 +163,11 @@ app.post('/api/data', authenticateAPIKey, async (req, res) => {
     })();
 });
 
+app.listen(PORT, '0.0.0.0', () => {
+    console.log(`Nexstar Backend running at http://localhost:${PORT}`);
+    console.log(`Endpoint for n8n: POST http://localhost:${PORT}/api/data`);
+});;
+
 app.listen(PORT, '0.0.0.0', () => {
     console.log(`Nexstar Backend running at http://localhost:${PORT}`);
     console.log(`Endpoint for n8n: POST http://localhost:${PORT}/api/data`);