Add missing cors header to example config

config/uwsgi_example.ini

@@ -9,6 +9,7 @@ http = 0.0.0.0:5000
 add-header = Access-Control-Allow-Origin: http://localhost:3000
 add-header = Access-Control-Allow-Credentials: true
 add-header = Access-Control-Allow-Headers: Cookie, Content-Type, X-Csrf-Token
+add-header = Access-Control-Allow-Methods: GET, POST, PUT, DELETE, PATCH
 
 manage-script-name = true
 chdir = ./src/