Apollo Federation - gateway service

gateway.js

const { ApolloServer } = require("apollo-server");
const { ApolloGateway } = require("@apollo/gateway");

const gateway = new ApolloGateway({
  serviceList: [
    { name: "posts", url: "http://localhost:5001" },
    { name: "comments", url: "http://localhost:5002" },
  ],
});

const server = new ApolloServer({
  gateway,
});

server.listen({ port: 5000 }).then(({ url }) => console.log(`Gateway ready at ${url}`));