FROM python:3.11-slim

# HuggingFace Spaces requires user ID 1000
RUN useradd -m -u 1000 user

WORKDIR /home/user/app

# Install dependencies (CPU-only torch to keep image small)
COPY --chown=user requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt \
    --extra-index-url https://download.pytorch.org/whl/cpu

# Copy application code
COPY --chown=user symbio_model.py .
COPY --chown=user vocab_fusion_model.py .
COPY --chown=user server.py .

# Switch to non-root user
USER user
ENV HOME=/home/user

EXPOSE 7860

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