Dockerfile

# Multi-stage build for production-ready Support Agent
FROM python:3.11-slim as builder

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

# Install build dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    curl \
    && rm -rf /var/lib/apt/lists/*

# Create virtual environment
RUN python -m venv /opt/venv
ENV PATH="/opt/venv/bin:$PATH"

# Copy requirements and install dependencies
WORKDIR /app
COPY requirements.txt .
RUN pip install --upgrade pip && \
    pip install -r requirements.txt

# Production stage
FROM python:3.11-slim as production

# Set environment variables
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PYTHONPATH=/app \
    PATH="/opt/venv/bin:$PATH"

# Create non-root user for security
RUN groupadd --gid 1000 appgroup && \
    useradd --uid 1000 --gid appgroup --shell /bin/bash --create-home appuser

# Install runtime dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    curl \
    ca-certificates \
    && rm -rf /var/lib/apt/lists/* \
    && apt-get clean

# Copy virtual environment from builder
COPY --from=builder /opt/venv /opt/venv

# Set working directory
WORKDIR /app

# Copy application code
COPY --chown=appuser:appgroup src/ ./src/
COPY --chown=appuser:appgroup alembic/ ./alembic/
COPY --chown=appuser:appgroup alembic.ini .
COPY --chown=appuser:appgroup pyproject.toml .

# Switch to non-root user
USER appuser

# Expose port
EXPOSE 8000

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD curl -f http://localhost:8000/health/live || exit 1

# Default command
CMD ["uvicorn", "src.api.main:app", "--host", "0.0.0.0", "--port", "8000", "--workers", "4"]