This borrows code from dockerfileBuilder, but has some differences
as depot is remote and can build and push to the fly registry directly.

The CLI arguments followed the style of the nixpacks flags.

To deploy using depot:
- flyctl deploy --depot

To run a machine:
* flyctl machines run --build-depot

Signed-off-by: Chris Goller <goller@gmail.com>

From there, we can just use the FromBuild mutation