This project has been deprecated with the release of the --music flag in AvaIre, you're welcome to try and use this version for self-hosting but you won't receive any support in the support server, nor will this project get any updates to keep up with Discords API or the library API, use this version at your own volition.
If you want to self-host Ava and just use it for music, you can find the project at github.com/avaire/avaire, you just need to start up the jar file using the --music flag to disable all the other features.
You can also use the publicly maintained version of Ava and get started using Ava right away by inviting her to your server from here: https://avairebot.com/invite
AvaIre Music is open-sourced software licensed under the GNU General Public License v3.0.