How to run Laravel on Github?

Question

GitHub

• Created a Laravel project
  
• Leaked all files on github
  
• Connected a third-party domain
  

When I switch to a domain, it says

404. There isn't a GitHub Pages site here.

1. How do I set up my project so I can get the site up and running?
   
2. I am using mysql database. How can I link it to github?
   

Here is the project on Github
The domain itself