Getting new files on public and storage folders on production

Hello, I have deployed a laravel application with Nginx on Ubuntu (on Digital Ocean).

After the deployment to the server, for some unknown reasons, I noticed that some unknown files are generated under public and storage folders.

When I type "git status" , the following files are those untracked files which i didn't add. Does anyone have any prior experience on such a situation in which certain unknow files are generated in public and storage folders?

public/assets/css/index.php

public/assets/fonts/index.php

public/assets/img/.5217d3ac.ico

public/assets/js/index.php

public/assets/modules/boostrap-daterangepicker/aqzphkmx.php

public/assets/modules/chart/.aa4ac55e.ico

public/css/.587027af.ico

public/x3kswu8e.php

storage/app/.dea43f5e.ico

storage/app/index.php

storage/framework/index.php

storage/index.php

storage/uploads/avatar.217f78dc.ico

storage/uploads/index.php