chore: add options

src/main.rs

@@ -172,6 +172,12 @@ impl Fairing for CORS {
     }
 }
 
+/// Catches all OPTION requests in order to get the CORS related Fairing triggered.
+#[options("/<_..>")]
+fn all_options() {
+    /* Intentionally left empty */
+}
+
 #[rocket::main]
 async fn main() -> GResult {
     println!("Program start");
@@ -211,6 +217,7 @@ async fn main() -> GResult {
         .mount(
             "/",
             routes![
+                all_options,
                 index,
                 quit,
                 reload,