You can always use one of more feature-full servers, like GraphQL Yoga. It offers a lot of things out-of-the box, things like subscriptions, caching, GraphiQL explorer, etc.

Ran into the same problem, but it turned out to be straightforward to add back the same or equivalent functionality. I opted to install playground instead of GraphiQL this time around. This is how I do it using express:

`
import { createHandler } from 'graphql-http/lib/use/express';
const expressPlayground = require('graphql-playground-middleware-express').default

app.use('/graphql', createHandler({ schema: schema }));
app.get('/playground', expressPlayground({ endpoint: '/graphql' }));
`

This works for a simple hello world schema. I haven't figured out how to connect with my neo4j driver. If anyone can provide some hints, please share. Hope this works for you.

For anyone interested, the solution for hooking neo4j driver is to craft your createHandler statement like so:

app.use('/graphql', createHandler({ schema: schema, context: (req) => ({ req, executionContext: driver }) }));