feat: Full petmaster CRM with NestJS API and React frontend

- Client management (CRUD with JSONB custom fields)
- Pet profiles
- Service catalog with per-client pricing
- Booking calendar with recurring appointments
- Invoicing with Stripe integration
- Real-time messaging (WebSocket)
- Self-booking portal
- Staff assignment
- Docker multi-stage builds
- Prisma schema + seed

README.md

@@ -0,0 +1,30 @@
+# Petmaster CRM
+
+A pet grooming/sitting/boarding/walking CRM built with NestJS + PostgreSQL + React.
+
+## Features
+
+- **Client Management**: CRUD clients, pets, custom fields (JSONB)
+- **Service Catalog**: Services with per-client pricing overrides
+- **Scheduling**: CRUD bookings, recurring appointments, staff assignment
+- **Invoicing**: Generate invoices from bookings, Stripe integration
+- **Message Center**: Client-staff messaging via WebSocket
+- **Self-Booking Portal**: Clients submit service requests
+
+## Quick Start
+
+```bash
+docker compose up --build
+```
+
+Then visit:
+- API: http://localhost:3000
+- Frontend: http://localhost:3001
+
+## Tech Stack
+
+- **Backend**: NestJS, Prisma ORM, PostgreSQL
+- **Frontend**: React + TypeScript, TailwindCSS, React Router
+- **Payments**: Stripe
+- **Real-time**: WebSocket (NestJS Gateway)
+- **Deployment**: Docker / Docker Compose