Choose a hosting option
Some places where you can host your bot.
Free options
These are some places where you can host your bot form free.
A raspberry PI
You can host your bot in a Raspberry Pi, this is nice option if you have one laying around. As the bot doesn't need any open ports hosting it in a Raspberry Pi should be a very straightforward and secure process.
Railway
Railway is a very simple hosting platform that gives us a good 500 hours of free hosting every month. This means that the bot will only be online for approximately 20 days. That's not so good but is a very viable option for hosting your bot for free.
Paid options
These are some known hosting options where you can host your bot as a docker container.
I recommend using the railway if you only want to test the bot. If you want to use it in production I advise you to host it on a Raspberry PI or use some paid hosting option.