serve from file instead of object

pkgs/server/create.ts

@@ -202,6 +202,11 @@ export const createServer = async () => {
                 //set content type
                 opt?.headers?.set("Content-Type", fileType.mime);
               }
+
+              return new Response(content, {
+                status: 200,
+                headers: opt?.headers || new Headers(),
+              });
             }