## Hello Package
A practice project used in [Crate and Module](https://practice.rs/crate-module/crate.html) chapter.

This project will guide us to create a package with a binary crate and several library crates in it.

The project structure is as below:
```shell
.
├── Cargo.lock
├── Cargo.toml
├── Readme.md
├── src
│   ├── back_of_house.rs
│   ├── front_of_house
│   │   ├── hosting.rs
│   │   ├── mod.rs
│   │   └── serving.rs
│   ├── lib.rs
│   └── main.rs
```