countries/index.js

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

const server = new ApolloServer({
  typeDefs,
  resolvers,
  introspection: true,
  playground: true
});

server.listen({port: process.env.PORT || 4000}).then(({url}) => {
  console.log(`🚀  Server ready at ${url}`);
});