will it be enough to specify my tanents in django app and my nginx server block

At this point i have my django tenant app running well locally. I am using django tenant schema library. i am going to deploy it on digital ocean but i have one question though. will it be enough to specify my tanents in django app or do i have to create records for them by creating subdomains in digital ocean dns and my nginx server block or just in nginx will do the trick. please someone help me thank you so much! you guys are awesome!