feat: initial project setup

- Add .NET 8 backend with Clean Architecture
- Add React + Vite + TypeScript frontend
- Implement authentication with JWT
- Implement Azure Blob Storage client
- Implement OCR integration
- Implement supplier matching service
- Implement voucher generation
- Implement Fortnox provider
- Add unit and integration tests
- Add Docker Compose configuration

docker-compose.yml

@@ -0,0 +1,60 @@
+version: '3.8'
+
+services:
+  postgres:
+    image: postgres:15-alpine
+    container_name: invoice-master-postgres
+    environment:
+      POSTGRES_USER: postgres
+      POSTGRES_PASSWORD: postgres
+      POSTGRES_DB: invoice_master
+    ports:
+      - "5432:5432"
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U postgres"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+
+  redis:
+    image: redis:7-alpine
+    container_name: invoice-master-redis
+    ports:
+      - "6379:6379"
+    volumes:
+      - redis_data:/data
+
+  backend:
+    build:
+      context: ./backend
+      dockerfile: Dockerfile
+    container_name: invoice-master-backend
+    environment:
+      ASPNETCORE_ENVIRONMENT: Development
+      ConnectionStrings__DefaultConnection: Host=postgres;Port=5432;Database=invoice_master;Username=postgres;Password=postgres
+    ports:
+      - "5000:8080"
+    depends_on:
+      postgres:
+        condition: service_healthy
+    volumes:
+      - ./backend/src:/app/src
+
+  frontend:
+    build:
+      context: ./frontend
+      dockerfile: Dockerfile
+    container_name: invoice-master-frontend
+    environment:
+      VITE_API_URL: http://localhost:5000/api/v1
+    ports:
+      - "5173:5173"
+    volumes:
+      - ./frontend:/app
+      - /app/node_modules
+
+volumes:
+  postgres_data:
+  redis_data: