Implement GitHub actions to automatically update the live bot when main is modified

[SnowHawkeye]

GitHub actions might let us automatically update the bot on the server when commits are pushed on the main branch. It would prevent us from having to restart the server manually when we update the bot.

With the current hosting solution (SparkedHost), this doesn't seem easy/possible because they give you little control over the server. Given that releases should be pretty rare, it is not too problematic to restart the server manually at the moment.

However, as the bot scales up, robust CI/CD may become necessary.