Initial project scaffold

Full-stack Dutch supermarket price tracker with FastAPI backend,
PostgreSQL/SQLAlchemy, Albert Heijn scraper, and Next.js frontend.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docker-compose.yml

@@ -0,0 +1,50 @@
+services:
+  db:
+    image: postgres:16
+    restart: unless-stopped
+    environment:
+      POSTGRES_USER: postgres
+      POSTGRES_PASSWORD: postgres
+      POSTGRES_DB: food_prices
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+    ports:
+      - "5432:5432"
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U postgres"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+
+  backend:
+    build: ./backend
+    restart: unless-stopped
+    depends_on:
+      db:
+        condition: service_healthy
+    environment:
+      DATABASE_URL: postgresql://postgres:postgres@db:5432/food_prices
+    ports:
+      - "8000:8000"
+    volumes:
+      - ./backend:/app
+
+  frontend:
+    build: ./frontend
+    restart: unless-stopped
+    depends_on:
+      - backend
+    environment:
+      NEXT_PUBLIC_API_URL: http://localhost:8000
+    ports:
+      - "3000:3000"
+    volumes:
+      - ./frontend/src:/app/src
+      - ./frontend/public:/app/public
+      - frontend_node_modules:/app/node_modules
+      - frontend_next:/app/.next
+
+volumes:
+  postgres_data:
+  frontend_node_modules:
+  frontend_next: