Dockerfile

# WordCloud Emergence - Production Dockerfile
# Professional containerization with multi-stage build

# Build stage
FROM python:3.9-slim as builder

LABEL maintainer="hazelian0619"
LABEL version="1.0.0"
LABEL description="WordCloud Emergence Backend Service"

# Set environment variables
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PIP_NO_CACHE_DIR=1 \
    PIP_DISABLE_PIP_VERSION_CHECK=1

WORKDIR /app

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

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

# Production stage
FROM python:3.9-slim

LABEL maintainer="hazelian0619"
LABEL version="1.0.0"
LABEL description="WordCloud Emergence Backend Service"

# Create non-root user
RUN groupadd -r appuser && useradd -r -g appuser appuser

# Set environment variables
ENV PYTHONPATH=/app \
    PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1 \
    PATH="/home/appuser/.local/bin:$PATH"

WORKDIR /app

# Copy installed packages from builder
COPY --from=builder /root/.local /home/appuser/.local
RUN chown -R appuser:appuser /home/appuser

# Copy application code
COPY src/ ./src/
COPY scripts/ ./scripts/

# Switch to non-root user
USER appuser

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD python -c "import requests; requests.get('http://localhost:8000/health')" || exit 1

# Expose port
EXPOSE 8000

# Default command
CMD ["python", "-m", "uvicorn", "wordcloud_emergence.api:app", "--host", "0.0.0.0", "--port", "8000"]