Put your alias configuration in /etc/apache2/mods-enable/alias.conf
Alias /alias "/home/user/your_laravel_project_folder_/public"
<Directory "/home/user/your_laravel_project_folder_/public">
Options Indexes FollowSymLinks Includes ExecCGI MultiViews
AllowOverride All
Require all granted
</Directory>
After that it should be working fine.
If you are getting 404 Page Not Found error then you might be missing this:
sudo a2enmod rewrite