# ============================================================
# 后端开发 Dockerfile — FastAPI + Uvicorn 热更新
# ============================================================
FROM python:3.13-slim

WORKDIR /app

# 系统依赖（Pillow / cryptography 编译所需）
RUN apt-get update && apt-get install -y --no-install-recommends \
    gcc \
    libpq-dev \
    libffi-dev \
    libjpeg-dev \
    zlib1g-dev \
    && rm -rf /var/lib/apt/lists/*

# 先装 Python 依赖（利用 Docker 缓存层，改代码不重装）
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# 代码通过 docker-compose volumes 挂载，不需要 COPY
# --reload 监听代码变化自动重启
CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000", "--reload"]