add db

Backend/server.js

@@ -12,6 +12,7 @@ app.use(bodyParser.urlencoded({ extended: false }))
 app.use('/api/auth', router.auth);
 app.use('/api/list', router.list);
 app.use('/api/shop', router.shop);
+app.use('/api/promotion', router.promotion);
 
 app.listen(port, () => {
   console.log('Express server listening on port ' + port)