Dockerfile

# Build stage
FROM python:3.11-slim AS builder

WORKDIR /app

# Install system dependencies for building
RUN apt-get update && apt-get install -y \
    gcc \
    g++ \
    curl \
    && rm -rf /var/lib/apt/lists/*

# Copy requirements first for better caching
COPY requirements.txt .
RUN pip install --no-cache-dir --user -r requirements.txt

# Runtime stage
FROM python:3.11-slim

WORKDIR /app

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

# Create non-root user for security first
RUN useradd -m -u 1000 appuser

# Copy Python packages from builder to appuser's home
COPY --from=builder --chown=appuser:appuser /root/.local /home/appuser/.local

# Make sure scripts in .local are available
ENV PATH=/home/appuser/.local/bin:$PATH

# Copy application code
COPY --chown=appuser:appuser . .

# Create directories with proper permissions
RUN mkdir -p /app/logs /app/chroma_db && \
    touch /app/filient.log && \
    chown -R appuser:appuser /app/logs /app/chroma_db /app/filient.log && \
    chmod 666 /app/filient.log

# Switch to non-root user
USER appuser

# Environment variables
ENV PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1 \
    PORT=8000

# Health check - ChromaDB pre-initialized from S3, conservative start-period for safety
HEALTHCHECK --interval=30s --timeout=10s --start-period=240s --retries=3 \
  CMD curl -f http://localhost:${PORT}/health || exit 1

# Expose port
EXPOSE ${PORT}

# Start command - use main_simple instead of main
CMD ["python", "-m", "uvicorn", "main_simple:app", "--host", "0.0.0.0", "--port", "8000", "--workers", "4"]