FROM python:3.11-slim

# Install Stockfish
RUN apt-get update && apt-get install -y \
    stockfish \
    openssh-client \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app

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

# Copy application
COPY src/ src/

# Generate SSH host key
RUN mkdir -p /etc/shellmate && \
    ssh-keygen -t ed25519 -f /etc/shellmate/ssh_host_key -N ""

# Run as non-root
RUN useradd -m shellmate
USER shellmate

EXPOSE 2222

CMD ["shellmate-server"]