server.js

const express = require('express')
const graphqlHTTP = require('express-graphql')
const schema = require('./schema')
const mongoose = require('mongoose')
const cors = require('cors')
const path = require('path')
require('dotenv').config()

const app = express()
const PORT = process.env.PORT || 3005

mongoose.connect(
  process.env.DB_URI,
  { useNewUrlParser: true },
  { useUnifiedTopology: true }
  //{ useMongoClient: true }
)

app.use(cors())

app.use('/graphql', graphqlHTTP({ schema, graphiql: true }))

const dbConnection = mongoose.connection
dbConnection.on('error', err => console.log(`Connection error: ${err}`))
dbConnection.once('open', () => console.log('Connected to DB!'))

app.use(express.static(path.join(__dirname, 'dist')))

app.get('*', (req, res) => {
  res.sendFile(path.join(__dirname, 'dist', 'index.html'))
})

app.listen(PORT, err =>
  console.log(err ? err : `Server started on port ${PORT}`)
)