Dockerfile

FROM python:3.12-slim

WORKDIR /app

# Set environment variables.
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PYTHONPATH=/app

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

# Install Python dependencies.
COPY pyproject.toml ./
RUN pip install --no-cache-dir --upgrade pip

# Copy project files and build.
COPY src/ ./src/
RUN pip install --no-cache-dir .

# Create a non-root user and switch to it.
RUN useradd -m appuser
USER appuser

# Run the application.
CMD ["python", "-m", "src.ctp_slack_bot.api.main"]