Dockerfile

# Base image
FROM python:3.11-slim

# Set working directory
WORKDIR /app

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

# Copy requirements first to leverage Docker cache
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Copy the rest of the application
COPY . .

# Create uploads directory
RUN mkdir -p uploads

# Set environment variables
ENV PYTHONUNBUFFERED=1
ENV FLASK_APP=app.py
ENV FLASK_ENV=production
ENV PYTHONDONTWRITEBYTECODE=1

# Add healthcheck
HEALTHCHECK --interval=30s --timeout=30s --start-period=5s --retries=3 \
    CMD curl -f http://localhost:5000/health || exit 1

# Expose port
EXPOSE 80

# Create a non-root user and set proper permissions
RUN useradd -m appuser && chown -R appuser:appuser /app
USER appuser

# Set the default command
CMD ["gunicorn", "--bind", "0.0.0.0:80", "--workers", "4", "--timeout", "120", "app:app"]