Do NOT try to install from the master repo.
For installation instructions and various unix distribution guides, use the DeploymentKit.
https://github.com/csirtgadgets/bearded-avenger-deploymentkit/wiki
There are many ways to get involved with the project. If you have a new and exciting feature, or even a simple bugfix, simply fork the repo, create some simple test cases, generate a pull-request and give yourself credit!
If you've never worked on a GitHub project, this is a good piece for getting started.
https://github.com/csirtgadgets/bearded-avenger/wiki
Copyright (C) 2017 the CSIRT Gadgets Foundation
Free use of this software is granted under the terms of the Mozilla Public License (MPLv2).