readme before pull request

[GlennWSo]

Hi,

I would like a contribute with pull requests to this project. Im looking for a readme or developers guideliness to adheare to.

[GlennWSo]

example of things. How do run a quick sanity check before submitting, like

nix run .#vm

[astro]

nix run .#qemu-example

[podocarp]

example of things. How do run a quick sanity check before submitting, like

The CI runs all the packages in flake.nix, and if it fails it will tell you how to replicate it locally.