server.js

const express = require('express')
const graphqlHTTP = require('express-graphql')
import schema from './schema'

// The root provides a resolver function for each API endpoint
const root = {
    hello: () => 'World'
}

const app = express()
app.use('/graphql', graphqlHTTP({
    schema: schema,
    rootValue: root,
    graphiql: true,
}))

app.listen(4000)