Web application for an ice cream truck fleet with real-time map

We run a fleet of ice cream trucks and need one web application to tie everything together—for both customers and dispatch. The customer opens a live map and sees which trucks are currently running, where each one is located, their next scheduled stops and when they'll arrive at their neighborhood; when a truck is a couple minutes away, a browser notification arrives. Each truck's card shows today's flavor inventory so nobody drives across town for a cone that sold out at 2 PM; the moment a flavor runs out it instantly disappears from the map. A booking section lets customers reserve a truck for a birthday, neighborhood party, wedding or corporate event: they pick a date, time window, location on map, number of guests and flavor package; we confirm, collect a deposit, and the booking goes into that specific truck's schedule. For events we can pre-order needed flavors and quantities so the truck leaves the depot already loaded. The dispatcher gets a day planner: assigns trucks to zones and time slots, arranges stop order and locks a truck once it's booked for an event. A loyalty card lives in the app: every ten cones earns one free, tracked by phone number or scannable code, no plastic card needed. Finally, since we license stalls to partners, we need a franchise locator so fans find the nearest branded truck or stand around town. Please build a fast mobile PWA, a separate driver screen, live GPS via Socket IO and an owner dashboard with sales by truck, flavor and zone. Payment, SMS and map tiles connect through their APIs.