Strapi Source Code

Hello,
I am a beginner in Strapi, and I can install and run Strapi. I wanted to make changes to the source code, so I downloaded the Strapi source code from the following address.

I was able to build it after making changes, but I couldn’t start it. Please guide me on how to run this project and which files I should upload to the host.
Thank you very much
Mansour Abdi

I can start it. I mean now I can see the changes in http://localhost:1337/admin , my problem is which files I must upload to host .
Thanks