do I need to use fastify in order to get a federated graphql gateway? docs only mention mercurius

[neon peak]

Which doesn't seem to be compatible with express.

My use case is simple. I have let's say 2 services:

• auth-service
• user-service

They're both their own graphql servers deployed separately, not talking to each other, with their own resolvers.

I want a gateway for the frontends to talk through and be able to combine graphql operations from both the auth-service and the user-service

Is this something that's possible?

[neon peak]

I think https://www.apollographql.com/docs/federation/managed-federation/overview/ is a better description -- is this possible at all with nestjs?