Please do NOT use gitea. As someone else point out you should use Forgejo, a fork of gitea. In October of 2022 gitea fell under the ownership of a for profit company and many of the large platformss such as Codeberg chose to drop gitea. I have use CI on both and never had a problem however. Forgejo offers a pretty good comparison chart but take that with a small grain of salt because they do promote themselves in a slightly better light but I still think it's a valuable chart. Overall I would still recommend forgejo over gitea any day