Laravel 5.1 server does not start

I have successfully uploaded my project files to server in root directory and when I write

"php artisan serve"

on putty to start the server, it do says

"Laravel development server started on http:// localhost:8000/"

but has no effect on project, home does not get loaded, instead shows the list of files and folders on laravel. but when I run the command

"php artisan serve --host mydomainName.com"

it says

"Laravel development server started on http:// mydomainName.com:8000/"

and when I open my website like this

"http:// mydomainName.com:8000"

on browser, the website gets start working, but now I have to use the port 8000, everytime I have to open my website, I know default port is 80, but server dose not listen to it, says not enough permissions.

Help???

via Chebli Mohamed