feat: add Docker deployment for the bot

- Add Dockerfile for Python 3.13 container
- Update docker-compose with naliia_bot service
- Add DB_HOST config for container networking
- Add .dockerignore for build optimization
- Update README with Docker documentation

Dockerfile

@@ -0,0 +1,17 @@
+FROM python:3.13-slim
+
+RUN apt-get update && apt-get install -y --no-install-recommends curl && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+RUN pip install poetry
+
+COPY pyproject.toml poetry.lock ./
+RUN poetry install --no-dev --no-interaction
+
+COPY src/ ./src/
+COPY .env.example .env
+
+EXPOSE 8010
+
+CMD ["poetry", "run", "uvicorn", "src.naliiabotapi.main:app", "--host", "0.0.0.0", "--port", "8010"]