Add header for CORS (#10)

Reviewed-on: #10

nginx/default.conf.template

@@ -21,6 +21,7 @@ server {
     }
 
     location ~ (\.well-known/|\@atomaka) {
+      add_header Access-Control-Allow-Origin '*';
       return 302 $scheme://pub.atomaka.com$request_uri;
     }