@rationem You could look at my backend app in this monorepo: https://github.com/kasir-barati/you-say
There I've implemented a NestJS custom backend app. BTW I have a question for you, right now my NextJS frontend build is broken and I do not know why, I mean I kinda know that it is because I am using @fusionauth/react-sdk and it needs to have access to document object but since during build it does not have that my build is defective. Any suggestion?
I also read this doc but it was not what I wanted since it was communicating directly with FusionAuth and in my case I do not want that 🙂.