How to Host a Rust Application on Vertra Cloud

my-server-rust/
├── src/
│   └── main.rs
├── Cargo.toml
├── Cargo.lock
└── vertracloud.config

[package]
name = "my-server-rust"
version = "0.1.0"
edition = "2021"

[dependencies]
actix-web = "4.4"
actix-rt = "2.9"
serde = { version = "1.0", features = ["derive"] }
serde_json = "1.0"
tokio = { version = "1.35", features = ["full"] }
env_logger = "0.11"
log = "0.4"

[[bin]]
name = "servidor"
path = "src/main.rs"

MAIN=Cargo.toml
VERSION=recommended

use actix_web::{web, App, HttpServer, HttpResponse, middleware};
use serde::{Deserialize, Serialize};
use std::env;
use log::info;

#[derive(Serialize, Deserialize, Clone)]
pub struct Item {
    pub id: u32,
    pub name: String,
    pub description: String,
}

#[actix_web::main]
async fn main() -> std::io::Result<()> {
    env_logger::init_from_env(env_logger::Env::new().default_filter_or("info"));

    let port = env::var("PORT")
        .unwrap_or_else(|_| "80".to_string())
        .parse::<u16>()
        .expect("PORT must be a valid number");

    info!("Starting server on 0.0.0.0:{}", port);

    HttpServer::new(|| {
        App::new()
            .wrap(middleware::Logger::default())
            .route("/", web::get().to(index))
            .route("/health", web::get().to(health))
            .route("/api/items", web::get().to(list_items))
            .route("/api/items", web::post().to(create_item))
    })
    .bind("0.0.0.0:".to_string() + &port.to_string())?
    .run()
    .await
}

async fn index() -> HttpResponse {
    HttpResponse::Ok().json(serde_json::json!({
        "message": "API Rust on Vertra Cloud",
        "version": "1.0.0"
    }))
}

async fn health() -> HttpResponse {
    HttpResponse::Ok().json(serde_json::json!({
        "status": "healthy",
        "service": "rust-api"
    }))
}

async fn list_items() -> HttpResponse {
    let items = vec![
        Item {
            id: 1,
            name: "Item 1".to_string(),
            description: "Description 1".to_string(),
        },
        Item {
            id: 2,
            name: "Item 2".to_string(),
            description: "Description 2".to_string(),
        },
    ];

    HttpResponse::Ok().json(items)
}

#[derive(Deserialize)]
pub struct CreateItemRequest {
    pub name: String,
    pub description: Option<String>,
}

async fn create_item(req: web::Json<CreateItemRequest>) -> HttpResponse {
    let item = Item {
        id: 3,
        name: req.name.clone(),
        description: req.description.clone().unwrap_or_default(),
    };

    HttpResponse::Created().json(item)
}