Strapi + Heroku. Why I can't add new content types in production!

Ok, thanks. Do you know what’s deploy method is the best and simple for Mac? I’m from iOS development, I really dummy in node, ubuntu etc. Digital Ocean is cool but I can’t use multiple relations in Strapi, because haven’t project locally on Mac.
By the way, why in Heroku when test or stage environment I still can’t modify collection types?