Dockerfile

FROM python:3.8-slim

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

# Install system dependencies
RUN apt-get update && apt-get install -y \
    git \
    curl \
    && rm -rf /var/lib/apt/lists/*

# Install Python dependencies
COPY requirements.txt .
RUN pip install --no-cache-dir --upgrade pip setuptools wheel && \
    pip install --no-cache-dir -r requirements.txt

WORKDIR /app
COPY . /app

# Pre-create directories needed by training script
RUN mkdir -p /app/checkpoints /app/logs

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