Need a Linux/PHP developer for Laravel Project Deployment

General information for the business: Software Consultancy
Description of requirements/functionality: We have recently developed a system using Laravel framework. We outsourced to external developers.

Developers have given all the source files of the system to deploy on the server in a subfolder of root dirctory.

I have deployed on my localhost and all works fine.

Now we have prepared the server hosting with php7.0 and MySQL.

When we deploy everything was right but it doesn't open the system on browser and says The requested URL is not found. I tried to search on internet but do not have much time to try different things. .

Developer also hide index page because we don't want our users to go directly to the system through URL. But they come from another system using Single Sign On.

I need to rectify this problem today, if you are interested to work with me on this please submit your proposal.
Specific technologies required: PHP/MySQL - Apache Ubuntu and Putty
OS requirements: Linux
Extra notes: