Different path frontend and backend

I want to build two GhostCMS frontends with one backend subdomain:

  • https://news.myblog.com with admin panel at https://admin.myblog.com/news/ghost
  • https://vlog.myblog.com with admin panel at https://admin.myblog.com/vlog/ghost

Is this possible?
How should I configure config.json and the Nginx reverse proxy?

From the Admin Config docs, it looks like you can’t specify the path for your Ghost admin/backend