Dockerfile

# HuggingFace Spaces — Docker backend
# Port 7860 is the required default for HF Spaces

FROM python:3.10-slim

# Create non-root user (HF Spaces requirement)
RUN useradd -m -u 1000 user
USER user
ENV PATH="/home/user/.local/bin:$PATH"

WORKDIR /app

# Copy and install dependencies first (Docker layer caching)
COPY --chown=user requirements.txt .
RUN pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir --extra-index-url https://download.pytorch.org/whl/cpu \
    -r requirements.txt

# Copy app files
COPY --chown=user . .

# Expose HF Spaces default port
EXPOSE 7860

# Start FastAPI server
CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]