server.js

// import 'dotenv/config'
import express from 'express'
import router from './server/routes/api'
import mongoose from 'mongoose'
import path from 'path'
import cors from 'cors'
import { exit } from 'process'



(async () => {
    const app = express()
    app.use(cors())
    if (! (process.env.MONGODB_URI || process.env.PORT) ){
        exit()
    }
    const PORT = process.env.PORT
    const DBname = "CV-Pdf"
    const MONGO_URL = process.env.MONGODB_URI || `mongodb://localhost/${DBname}`
    const connection = await mongoose
        .connect(MONGO_URL, {
            useUnifiedTopology: true,
            useNewUrlParser: true,
            useFindAndModify: false 
        })
        .catch(err => {
            console.error('Error connecting db:', err.message)
            process.env.notDBconnection = true
            exit()
        })

    app.get('/health', (req, res) => res.json({ UP: !!connection }))

    if (!connection) {
        app.use((req, res) => {
            res.status(500)
            res.json({ error: 'Server is unavailable at the moment' })
            console.error('Server is unavailable at the moment')
        })
    }
    else {
        app.use(function (req, res, next) {
            res.header('Access-Control-Allow-Origin', '*')
            res.header('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE,OPTIONS')
            res.header('Access-Control-Allow-Headers', 'Content-Type, Authorization, Content-Length, X-Requested-With')
            next()
        })
        app.use(express.static(path.join(__dirname, 'build')))
        app.use('/', router)
        app.get('*', function (req, res) {
            res.sendFile(path.join(__dirname, 'build', 'index.html'))
        })
        app.listen(PORT, () => console.log(`Server is listening on port ${PORT}`))
    }
})()