FROM python:3.10-slim

WORKDIR /app

# System deps
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential git curl && \
    rm -rf /var/lib/apt/lists/*

# Python deps
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# App
COPY . .

# Cache tokenizer (optional)
RUN python -c "from transformers import AutoTokenizer; AutoTokenizer.from_pretrained('mistralai/Mistral-7B-Instruct-v0.3')"

ENV HF_HOME=/app/.cache/huggingface
ENV TRANSFORMERS_CACHE=/app/.cache/huggingface

EXPOSE 7860
CMD ["python", "app.py"]