No building and running instructions, suspicious path dependency in Cargo.toml.

[vi]

Is the project a one-off experiment to get Rust going on Unikraft or it is supposed to keep working even as Unikraft and Rust evolve?

Trying to build it like "app-helloworld" fails with "cannot build project directory without a Kraftfile". Also Cargo.toml contains a hard coded path ../../unikraft/lib/ukrust/, which suggests that it is not a stand-alone project.

In any case, README should be longer.