To set up the bot, simply invite it to your server and then create a private channel with the name #rebot-reports.
Server members will be able to report messages by right-clicking a message, clicking "Apps", and then clicking "Report to server mods". The report will be sent in the #rebot-reports channel where moderators will be able to mute/kick/ban the user.
(I wrote most of this in like two days so don't expect anything to work)