feat: add help version notices and user errors

Dockerfile

@@ -6,5 +6,5 @@ ENV PYTHONDONTWRITEBYTECODE=1 \
 WORKDIR /app
 COPY requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
-COPY bot.py apinex_client.py user_store.py ./
+COPY bot.py apinex_client.py user_store.py help_message.py VERSION ./
 CMD ["python", "bot.py"]