As an admin of a Dioptra deployment I want the the Dioptra install and configuration process as simple as possible

[keithmanville]

Make the Dioptra install and configuration process as simple as possible.

Tasks:

• Implement our own GitHub runners to enable signing of docker images using cosign #594
• Reconfigure and expand GitHub action workflows to use the new runners and sign images
• Update the cookiecutter template to pull images from the docker registry by default
• Implement dioptra command line tool to configure and install Dioptra
• Reconfigure GitHub action workflows to build, sign, and register Dioptra package
• Update documentation with new setup instructions

Definition of done:

• The user is able to run a single command so that upon completion the user has an installed single-machine deployment of Dioptra with a working example.