Dockerfile

# 1. Use Hugging Face recommended Python image
FROM python:3.9

# 2. Create non-root user (required by Hugging Face Spaces)
RUN useradd -m -u 1000 user
USER user
ENV PATH="/home/user/.local/bin:$PATH"

# 3. Set working directory
WORKDIR /app

# 4. Install essential system dependencies
#    - switched to root temporarily
USER root
RUN apt-get update && \
    apt-get install -y --no-install-recommends gcc libpq-dev && \
    rm -rf /var/lib/apt/lists/*
USER user

# 5. Copy requirements first for caching
COPY --chown=user requirements.txt .

# 6. Upgrade pip & install Python dependencies
RUN python -m pip install --upgrade pip \
    && pip install --no-cache-dir -r requirements.txt

# 7. Copy the rest of the app code
COPY --chown=user . .

# 8. Expose Hugging Face default port
EXPOSE 7860

# 9. Run Uvicorn server for FastAPI app
CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "7860", "--workers", "1"]