Add support for Personal Package Archive (PPA) installation of Lodestar

[superphiz]

Describe the solution you'd like

Current available installation methods require downloading and installing packages from github or docker, but these installation methods require significant effort on behalf of the user. Ethereum maintains a PPA and geth is currently most-easily installed using this method. If other clients adopt the PPA installation method it will significantly reduce the effort required to install a Consensus client and enable people with limited technical ability to quickly and easily upgrade their consensus client using standard apt repositories.