# Dockerfile：FastAPI 应用镜像（gunicorn + uvicorn worker 多进程生产模式）
FROM python:3.10-slim

ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    TZ=Asia/Shanghai

WORKDIR /app

# 先装依赖，利用 Docker 层缓存
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt -i https://pypi.tuna.tsinghua.edu.cn/simple

# 拷贝项目代码
COPY . .

EXPOSE 8000

# gunicorn 多 worker 启动（uvicorn.workers.UvicornWorker 兼容 FastAPI 异步）
# 生产环境建议 worker 数 = CPU 核数 * 2 + 1
CMD ["gunicorn", "main:app", \
     "--workers", "4", \
     "--worker-class", "uvicorn.workers.UvicornWorker", \
     "--bind", "0.0.0.0:8000", \
     "--timeout", "60", \
     "--access-logfile", "-", \
     "--error-logfile", "-"]