cursor done.

server/config.js

@@ -0,0 +1,11 @@
+const path = require('path');
+
+const PORT = process.env.PORT || 3000;
+const JWT_SECRET = process.env.JWT_SECRET || 'your-secret-key-change-in-production';
+const DB_PATH = path.join(__dirname, '..', 'data.db');
+
+module.exports = {
+  PORT,
+  JWT_SECRET,
+  DB_PATH
+};