fully is a full solution for full stack with react and koa ,with fully you can easily start a CMS project , with SSR,content manager,code generator.Notice that , fully dons't help you build a website or an application , it's only starter , with some built-in libraries (which I think would pretty fit for most people),you can build you web application yourself easily .If everything fully used dose not trouble you , fully will be a perfect foundation，otherwise you can fork it and make it yourself.