connection security: https with an API token, auth on Digger Cloud, provided by Frontegg; if you choose to self-host you can also integrate your own auth provider eg Auth0, Okta, etc
setting up backend on-prem: yes, docs are severely lacking though atm. Will get back to you on this asap
To be able to use digger productively as a large company as we are, we need a better documentation about the backend: