feat: dockerize app and convert to pyproject setup

- Add pyproject.toml with proper metadata and dependency groups
- Create multi-stage Dockerfile for backend
- Add docker-compose.yml with dev/prod profiles
- Create frontend Dockerfile with nginx
- Add .dockerignore for optimized builds
- Update README with Docker instructions and troubleshooting
- Remove requirements.txt in favor of pyproject.toml
- Ensure data persistence with Docker volumes

docker-compose.yml

@@ -0,0 +1,60 @@
+version: "3.8"
+
+services:
+  backend:
+    build:
+      context: ./backend
+      dockerfile: Dockerfile
+    container_name: backup-tool-backend
+    ports:
+      - "8000:8000"
+    environment:
+      - DATABASE_URL=sqlite+aiosqlite:///data/backup_tool.db
+      - CORS_ORIGINS=http://localhost:3000
+      - BACKUP_STORAGE_PATH=/app/backups
+    volumes:
+      - backup-data:/app/data
+      - backup-storage:/app/backups
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD", "python", "-c", "import urllib.request; urllib.request.urlopen('http://localhost:8000/api/health')"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 5s
+
+  frontend:
+    build:
+      context: ./frontend
+      dockerfile: Dockerfile
+    container_name: backup-tool-frontend
+    ports:
+      - "3000:80"
+    depends_on:
+      - backend
+    restart: unless-stopped
+    profiles:
+      - prod
+
+  frontend-dev:
+    image: node:20-alpine
+    container_name: backup-tool-frontend-dev
+    working_dir: /app
+    ports:
+      - "3000:3000"
+    volumes:
+      - ./frontend:/app
+      - /app/node_modules
+    command: sh -c "npm install && npm run dev"
+    environment:
+      - VITE_API_URL=http://localhost:8000
+    depends_on:
+      - backend
+    profiles:
+      - dev
+
+volumes:
+  backup-data:
+    driver: local
+  backup-storage:
+    driver: local