Actix web

use actix_web::{web, App, HttpServer, Responder};

fn index() -> impl Responder {
    "Hello World"
}

fn main() -> std::io::Result<()> {
    HttpServer::new(
        || App::new().service(web::resource("/").to(index)))
        .bind("0.0.0.0:12345")?
        .run()
}