Add documentation

[soggycactus]

Would love to use this tool, but the documentation seems very sparse. I would love some pointers on how to install this on my K8s cluster

[terinjokes]

Howdy. This is on my to-do list for next week. Unfortunately, I've been pretty busy elsewhere.

[Shikachuu]

Hello @terinjokes,
Are there plans in the near future to add some basic documentation?
Even some md files in a folder would be enough, once we can get started properly, we can create PRs to update it later. 😄

[terinjokes]

tl;dr: use cmd/lockbox-keypair to generate a new keypair, save a secret in the server with keys "private" and "public", then deploy the files in the deployment directory.

Eventually I'll write more complete docs.