Engine setup with Apollo Server

server.js

// Install and import the apollo-engine package
const { ApolloEngine } = require('apollo-engine');
const { graphqlExpress } = require('apollo-server-express');

const app = express();

// Enable tracing and cacheControl in Apollo Server
app.use('/graphql', graphqlExpress({
  tracing: true,
  cacheControl: true,
  schema: schema,
  // ... other options
});

// Initialize Engine with an API key
const engine = new ApolloEngine({ apiKey: 'API_KEY' });

// Replace app.listen() with engine.listen()
engine.listen({
  port: 3000,
  expressApp: app,
});