FROM python:3.11-slim

WORKDIR /app

# 安装依赖
COPY backend/requirements.txt .
RUN pip install --no-cache-dir \
    -i https://pypi.tuna.tsinghua.edu.cn/simple \
    --trusted-host pypi.tuna.tsinghua.edu.cn \
    -r requirements.txt

# 复制所有文件
COPY . .

# 环境变量（可被 docker-compose 覆盖）
ENV FLASK_ENV=production
ENV DB_HOST=db
ENV DB_PORT=3306
ENV DB_USER=root
ENV DB_PASSWORD=lingshu123
ENV DB_NAME=lingshu

EXPOSE 5000

CMD ["python", "backend/app.py"]