Added rocket

Cargo.toml

@@ -6,3 +6,4 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+rocket = "0.5.0-rc.2"

src/main.rs

@@ -1,3 +1,11 @@
-fn main() {
-    println!("Hello, world!");
+#[macro_use] extern crate rocket;
+
+#[get("/")]
+fn index() -> &'static str {
+    "Hello, world!"
+}
+
+#[launch]
+fn rocket() -> _ {
+    rocket::build().mount("/", routes![index])
 }