countries/index.js

import resolvers from './resolvers';
import typeDefs from './schema';
import {ApolloServer} from 'apollo-server';

const server = new ApolloServer({
  typeDefs,
  resolvers,
  introspection: true,
  playground: true,
  engine: {
    apiKey: process.env.ENGINE_API_KEY
  }
});

server.listen({port: process.env.PORT}).then(({url}) => {
  console.log(`🚀  Server ready at ${url}`);
});