经过这么长时间，我终于解决了这个问题.我将API保留在单独的域中，但是将前端和后端集成在同一个域中，但位于不同的子文件夹中.所以现在我有:

I've finally solved this problem, after so much time. I kept API on separated domain, but had integrated front-end and back-end at the same domain but in different sub-folders. So now i have:

• api.app.dev

app.dev (前端)

app.dev/backend

和(本机)会话现在像魅力一样工作.我在服务这两个子目录时也遇到了麻烦，因此我打开了新线程.我使用的nginx设置是:

And (native) sessions now working like charm. I also had troubles with serving these two sub-directories, so i've opened new thread. There is nginx settings whose i used:

在同一域中服务多个站点

谢谢大家！