Add https://gitea.io/en-us/ website translation to crowdin or github

I want to translate site home page but i can’t find any files on github that contain translation strings or even there.
I’m planning to finish translation of doc files on github for Russian tomorrow and contributions guide too!

Thanks for suggestion. The website is contained in the following repo: https://gitea.com/gitea/website/ and the docs.gitea.io website content can be found here: https://github.com/go-gitea/gitea/tree/master/docs/content/doc