"we're gunna get Nostr sign in implemented in our app"

Yes. This.

General public seems to view Nostr as only a "social media platform". But one of the greatest use cases is the ability to have one identity that can be used across the entire internet. 1 private/public key pair to prove who I am, without having to KYC or dox my IRL identity. Nostr can be so much more than social media.