FROM python:3.9-slim

WORKDIR /app

# Install system dependencies
RUN apt-get update && apt-get install -y \
    sqlite3 \
    && rm -rf /var/lib/apt/lists/*

# Copy dependency file
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Copy source code
COPY . .

# Environment variables
ENV PYTHONUNBUFFERED=1

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