DockerFile

# ==============================================================================
# STAGE 1: Compilation Sandbox Environment
# ==============================================================================
FROM python:3.14-slim AS builder

WORKDIR /app

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

COPY requirements.txt .
RUN pip install --no-cache-dir --user -r requirements.txt

# ==============================================================================
# STAGE 2: Minimum Footprint Production Runtime Engine
# ==============================================================================
FROM python:3.14-slim AS runner

WORKDIR /app

# Enforce strict Least Privilege Principles by using a low-privilege runtime account
RUN useradd -u 8888 apprunner && chown -R apprunner:apprunner /app
USER apprunner

COPY --from=builder /root/.local /home/apprunner/.local
COPY --chown=apprunner:apprunner . .

ENV PATH=/home/apprunner/.local/bin:$PATH
EXPOSE 8888

CMD ["python", "server.py"]