fix documentation publish command (#284)

[bfiessinger]

regarding #284 the publish command in the installation section of the docs would publish all migrations, public assets, configs and views.

Depending the amount of packages this could lead to a tremendous amount of published files that most likely would not be necessary.

Changing php artisan vendor:publish --all to php artisan vendor:publish --provider="Aimeos\Shop\ShopServiceProvider" publishes all files needed for the aimeos Laravel package to work.

[aimeos]

Thanks a lot!

[bfiessinger]

Thanks a lot!

You're welcome! Have a great day ;)