Simpler multiple node install: Installation script that uses SSH

Users manually install our packages on each node and edit relevant config. We need to have simpler multiple node install steps. We could do this by using an installation scripts that uses SSH.

Start by reviewing the project's existing manual package-installation and configuration steps. The issue names no files or tests, so first identify the installation entry points and configuration touched across nodes; done means a script can coordinate the required setup over SSH.

Written by the indexing model from the issue text.