Initial commit: Casino bot

Dockerfile

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+FROM python:3.11-slim
+WORKDIR /app
+
+RUN apt-get update && apt-get install -y sqlite3 && rm -rf /var/lib/apt/lists/*
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY src ./src
+RUN mkdir -p /app/data
+
+# non-root
+RUN useradd -r -s /bin/false botuser && chown -R botuser:botuser /app
+USER botuser
+
+# healthcheck: open/close DB
+HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
+  CMD python -c "import sqlite3; sqlite3.connect('/app/data/blackjack.db').close()" || exit 1
+
+CMD ["python", "-m", "src.bot"]
+