Add backend api and engine

docker/docker-compose.yml

@@ -0,0 +1,49 @@
+version: '3.8'
+
+services:
+  # 后端 API
+  backend:
+    build:
+      context: ./backend
+      dockerfile: Dockerfile
+    ports:
+      - "8000:8000"
+    environment:
+      - DATABASE_URL=sqlite:///./data/app.db
+      - MINIO_ENDPOINT=minio:9000
+      - MINIO_ACCESS_KEY=admin
+      - MINIO_SECRET_KEY=password123
+      - MINIO_BUCKET=ai-audio
+    volumes:
+      - ./backend:/app
+      - ./backend/data:/app/data
+    depends_on:
+      - minio
+
+  # 对话引擎 (py-active-call)
+  engine:
+    build:
+      context: ../py-active-call
+      dockerfile: Dockerfile
+    ports:
+      - "8001:8001"
+    environment:
+      - BACKEND_URL=http://backend:8000
+    depends_on:
+      - backend
+
+  # MinIO (S3 兼容存储)
+  minio:
+    image: minio/minio
+    ports:
+      - "9000:9000"
+      - "9001:9001"
+    volumes:
+      - ./storage/minio/data:/data
+    environment:
+      MINIO_ROOT_USER: admin
+      MINIO_ROOT_PASSWORD: password123
+    command: server /data --console-address ":9001"
+
+volumes:
+  minio-data: