404 not found nginx/1.14.0 (ubuntu) laravel - Muly app

hello all

seeking help for above error. i was installing muly app on Nginx server but I get above error while my default html works well.
There is not document to install app on nginx, only available for apache. Very strange things are not working and no help.
I am able to reach to http://localhost/install url but with error 404 not found.
Any one can ? please help?