Using Drone without GIT

Hi, I’m new using Drone and I’m trying using Drone to build Gatsby website using webhook and the CMS will trigger that webhook, but I cannot start Drone Server without providing OAuth Github/Gitlab/Gitea
Please advice or Documentation link, because I cannot find it searching so far

Drone must be used in conjunction with a source control management system (i.e. github, gitlab, bitbucket, gogs, or gitea). You cannot use Drone without one of these systems.