FROM python:3.11-slim

WORKDIR /app

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

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

# Copy application code
COPY . .

# Create data directory for SQLite fallback (writable)
RUN mkdir -p /app/data && chmod 777 /app/data

# Create non-root user
RUN useradd --create-home appuser && chown -R appuser:appuser /app
USER appuser

EXPOSE 8000

# Use uvicorn directly for better async support
CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000", "--workers", "1"]