Add ACAO header

src/http/handler.rs

@@ -90,6 +90,7 @@ fn endpoint_handler(
     endpoint: &str,
 ) {
     res.add_header("Cache-Control", "no-store");
+    res.add_header("Access-Control-Allow-Origin", "*");
 
     let mut error = |error: Error, client: &mut super::HttpStream| {
         println!("{}", error.to_string());