Basic Apollo gateway

gateway.js

import { ApolloServer } from 'apollo-server-micro';
import { ApolloGateway, IntrospectAndCompose } from '@apollo/gateway';

const apolloServer = new ApolloServer({
  gateway: new ApolloGateway({
    supergraphSdl: new IntrospectAndCompose({
      subgraphs: [
        { name: 'saleor', url: process.env.SALEOR_GRAPHQL },
      ],
    }),
  }),
  subscriptions: false,
});

const startServer = apolloServer.start();

const gateway = async (req, res) => {
  await startServer;

  return apolloServer.createHandler({
    path: '/api/gateway',
  })(req, res);
};

export default gateway;