add Shield to remove warning

src/main.rs

@@ -3,6 +3,7 @@
 use rocket::form::Form;
 use rocket_dyn_templates::{Template, context};
 use rocket::fs::FileServer;
+use rocket::shield::Shield;
 use std::net::{IpAddr, Ipv4Addr};
 
 
@@ -53,6 +54,7 @@ fn rocket() -> _ {
     rocket::build()
         .mount("/", routes![index, login])
         .mount("/static", FileServer::from("static"))  // Serves files in the `static` directory
+        .attach(Shield::new())
         .attach(Template::fairing())
 }