Dockerfile2

# ======================
# Stage 1: Builder
# ======================
FROM python:3.11-slim as builder

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

# Install system dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    gcc \
    g++ \
    libpq-dev \
    && 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
COPY requirements.txt .
RUN pip install --upgrade pip setuptools wheel && \
    pip install -r requirements.txt

# ======================
# Stage 2: Runtime
# ======================
FROM python:3.11-slim

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

# Install runtime dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    libpq5 \
    curl \
    && rm -rf /var/lib/apt/lists/*

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

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

# Set working directory
WORKDIR /app

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

# Create necessary directories
RUN mkdir -p /app/logs && \
    chown -R appuser:appuser /app/logs

# Switch to non-root user
USER appuser

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
    CMD curl -f http://localhost:${API_PORT:-8000}/health || exit 1

# Expose port
EXPOSE 8000

# Default command
CMD ["python", "-m", "uvicorn", "src.researchapi.main:app", "--host", "0.0.0.0", "--port", "8000"]