app.js

const express = require('express');
const bodyParser = require('body-parser');
const graphqlHttp = require('express-graphql');
const mongoose = require('mongoose');

const graphQlSchema = require('./graphql/schema/index');
const graphQlResolvers = require('./graphql/resolvers/index');

const app = express();

app.use(bodyParser.json());

app.use(
  '/graphql', graphqlHttp({
    schema: graphQlSchema,
    rootValue: graphQlResolvers,
    graphiql: true
  })
);

mongoose
  .connect(
   `mongodb+srv://${
    process.env.MONGO_USER}:${
    process.env.MONGO_PASSWORD}@cluster0-9trvq.mongodb.net/${
    process.env.MONGO_DB}?retryWrites=true`,
    {useNewUrlParser: true}
  )
  .then(() => {
    app.listen(3000);
  })
  .catch(err => {
    console.log(err);
  });