Dockerfile

FROM python:3.8-slim

# 1. Set environment variables
ENV PYTHONUNBUFFERED=1 \
    DEBIAN_FRONTEND=noninteractive \
    PIP_NO_CACHE_DIR=1

# 2. Install system dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    libopenblas-dev \
    git \
    curl \
    cmake \
    && rm -rf /var/lib/apt/lists/*

# 3. Install Python packages in optimal order
COPY requirements.txt .
RUN pip install --upgrade pip setuptools wheel && \
    pip install torch==2.2.1 --index-url https://download.pytorch.org/whl/cpu && \
    pip install --no-deps vllm==0.3.0 && \
    pip install -r requirements.txt

WORKDIR /app
COPY . /app

# 4. Create necessary directories
RUN mkdir -p /app/checkpoints /app/logs

CMD ["python", "train.py"]