Change base url of laravel app

Currently I am developing a site for a client using Laravel 5.1.

On the testing server it is http://ift.tt/1TNh8Bq, but on the clients server it will just be example.com/.

Is there a way to set the sites base url to point to /sites/project/ instead of the root when using our testing server, and then using the root as the base url on the clients server? Because currently I have to go and put in the base url before every link and change it every time I change servers - which is bad practice.

EDIT

I mainly want to do this when using assets, so the link to the asset points to the correct folder. Currently it points to example.com/assets/... and on the testing server it points to the same thing, when it should be pointing to http://ift.tt/27mzTG6...

via Chebli Mohamed