Dockerfile

# Stage 1: Builder
FROM python:3.10-slim as builder

WORKDIR /app

# Install system dependencies for building
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    libsm6 \
    libxext6 \
    libxrender-dev \
    libgomp1 \
    && rm -rf /var/lib/apt/lists/*

# Copy requirements
COPY requirements.txt .

# Install Python dependencies
RUN pip install --user --no-cache-dir -r requirements.txt

# Stage 2: Runtime
FROM python:3.10-slim

WORKDIR /app

# Install runtime dependencies only
RUN apt-get update && apt-get install -y --no-install-recommends \
    libsm6 \
    libxext6 \
    libxrender-dev \
    libgomp1 \
    && rm -rf /var/lib/apt/lists/*

# Copy Python packages from builder
COPY --from=builder /root/.local /root/.local

# Set environment variables
ENV PATH=/root/.local/bin:$PATH \
    PYTHONUNBUFFERED=1 \
    FLASK_APP=app.py

# Create necessary directories
RUN mkdir -p static/uploads static/css models results

# Copy application files
COPY app.py .
COPY requirements.txt .
COPY templates/ ./templates/
COPY static/ ./static/

# Expose port
EXPOSE 5000

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
    CMD python -c "import urllib.request; urllib.request.urlopen('http://localhost:5000/health')" || exit 1

# Run application
CMD ["python", "app.py"]