Error 500 when called index.php in laravel application

I am deploying a laravel application inside windows based docker container using IIS. When I run the application after running docker container the index.php and server.php page present at C:\inetpub\wwwroot works fine. However, C:\inetpub\wwwroot\public\index.php returns 500 error. I have enabled the logs, run composer update and applied directory permissions as well. But still no luck.

IIS10 PHP 7.0 Laravel 5.5

via Chebli Mohamed