# 🚀 P2优化：使用轻量级基镜像，从 900MB 降到 ~150MB
FROM python:3.9-slim

# 设置工作目录
WORKDIR /code

# 安装系统依赖 (psycopg2 需要)
RUN apt-get update && apt-get install -y --no-install-recommends \
    libpq-dev \
    ca-certificates \
    libssl-dev \
    && rm -rf /var/lib/apt/lists/*

# 先复制依赖文件，利用 Docker 缓存层
COPY ./requirements.txt /code/requirements.txt
RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt

# 复制应用代码
COPY . .

# 启动命令
CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]