update README.md

README.md

@@ -4,12 +4,15 @@ A simple Telegram chatbot to suggest who will order the lunch today!
 
 ## Deployment
 
-1. Create bot using telegram [@botfather](https://telegram.me/BotFather)
-   see [How to get Telegram Bot Chat ID](https://gist.github.com/nafiesl/4ad622f344cd1dc3bb1ecbe468ff9f8a)
-2. Create a telegram group, add the bot to the group, and make it admin
-3. You need to set the env var `BOT_TOKEN` and `CHAT_ID`. (you get from previous steps, where `CHAT_ID` should refer to the group created in prev step)
-4. Run the app using `python main.py`.
-5. Start sending commands in the group (e.g. `/help`), the bot will detect food names as well (using chatgpt)
-6. Enjoy!
-
-> This app uses [telebot](https://github.com/mhewedy/telebot) 
+1. Create bot using telegram [@BotFather](https://telegram.me/BotFather)
+   see [How to get Telegram Bot Chat ID](https://gist.github.com/nafiesl/4ad622f344cd1dc3bb1ecbe468ff9f8a).
+2. Create a telegram group, add the bot to the group, and make it admin.
+3. Set the env var `BOT_TOKEN` and `CHAT_ID`. (you get from previous steps, where `CHAT_ID` should refer to
+   the group created in prev step).
+4. Optionally, if you need to persist the data between restarts, configure `VOLUME_ROOT_FS` to point to path of some
+   persistent volume (block or network storage)
+5. Run the app using `python main.py`.
+6. Start sending commands in the group (e.g. `/help`), the bot will detect food names as well (using chatgpt)
+7. Enjoy!
+
+> This app built using [telebot](https://github.com/mhewedy/telebot)