Best way to use without Express Middleware?

I have a separate Express server on port 3000 that deals with standard app routes, but I would like to have any GraphQL requests come through a `/graphql` route and be proxied to Apollo (running on 4000). I'm using `http-proxy` but it does not seem to want to connect (timeout with bad request).

There has to be something wrong with how I'm trying to set this up. Does anyone have experience running a custom server alongside Apollo?