Message Manager is a discord bot designed to make the management of important messages in servers easier, allowing the editing of a single message by more than one staff member.
Head on over to the website for documentation, and in invite.
Self hosting the bot is unsupported, but not forbidden, so if that's what you want to do proceed with caution.
The bot runs via a set of different processes (shown below), this is done in order to improve efficency (as typical discord in-memory cache bots are resource intensive).
These processes have their own repo's under the organisation.