fix(middleware): Return after root redirect

Fixes Error [ERR_HTTP_HEADERS_SENT]: Cannot set headers after they are sent to the client

Fixes #104

src/templates/middleware.js

@@ -28,6 +28,7 @@ middleware['i18n'] = async ({ app, req, res, route, store, redirect, isHMR }) =>
   const rootRedirect = '<%= options.rootRedirect %>'
   if (route.path === '/' && rootRedirect) {
     redirect('/' + rootRedirect)
+    return
   }
 
   // Handle browser language detection