Dockerfile

# Use Python 3.11 slim image for better performance and smaller size
FROM python:3.11-slim

# Set working directory
WORKDIR /app

# Set environment variables
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    FLASK_ENV=production \
    PORT=7860

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

# Copy requirements first for better caching
COPY req.txt .

# Install Python dependencies
RUN pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir -r req.txt

# Copy application code
COPY . .

# Create a non-root user for security
RUN useradd --create-home --shell /bin/bash app && \
    chown -R app:app /app

# Switch to non-root user
USER app

# Expose the port (Hugging Face Spaces uses 7860 by default)
EXPOSE 7860

# Health check
HEALTHCHECK --interval=30s --timeout=30s --start-period=5s --retries=3 \
    CMD curl -f http://localhost:7860/health || exit 1

# Run the application with Gunicorn for production
CMD ["gunicorn", "--bind", "0.0.0.0:7860", "--workers", "2", "--timeout", "120", "--keep-alive", "2", "--max-requests", "1000", "--max-requests-jitter", "100", "app:app"]