I wanted to experiment with discord.js.
Nah, this is just a proof of concept.
Sure, go ahead and host it yourself.
First, install dependencies:
npm i
While that happens, create your own application in the Discord Developer Portal. In the "Bot" tab, click on "Add Bot", then generate a new token. Now you can copy config.example.json into config.json and fill it with your Application ID and Discord Bot Token.
Build the project:
npm run build
Then, deploy your commands:
npm run deploy-commands
This will also give you a link to invite the bot to any server.
Finally, type this to start the bot:
npm start
Enjoy!
If for some reason you want to change the bot permissions, you can visit this page and generate a custom link.