Online ordering app for Restaurant

An online order app/native app needs to be build ...for the customer as well as the owner i.e admin side. From customer side the customer can see the menu add it into cart and can pay i.e payment integration. As its just for collection so no order tracking and no takeaways. From the admin end owner can customise the menu. Add special dish of the day . Customise happy hours and manage flat discounts. Notification system needs to be integrated for better targeting of customers. Referral system needs to be integrated where special discounts needs to be given for signup of new customer and new order. Basically swiggy kind of app with its features but just for a single restaurent.