server.js

const express = require('express');
const mongoose = require('mongoose');
const bodyParser = require('body-parser');
const passport = require('passport');
const path = require('path');

const users = require('./routes/api/users');
const profile = require('./routes/api/profile');
const posts = require('./routes/api/posts');

const app = express();
app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());
app.use(passport.initialize());

//passport config
require('./config/passport.js')(passport);
const port = process.env.PORT || 3001;
//db config
const db = require('./config/keys').mongoURI;
//connect to mongodb
mongoose
  .connect(db)
  .then(() => {
    console.log('MongoDB connected');
  })
  .catch(err => {
    console.log(`Error : ${err}`);
  });

//Use Routes
app.use('/api/users', users);
app.use('/api/profile', profile);
app.use('/api/posts', posts);

//serve static assets if in production
if (process.env.NODE_ENV === 'production') {
  //set static folder
  app.use(express.static('client/build'));
  app.get('*', (req, res) => {
    res.sendFile(path.resolve(__dirname, 'client', 'build', 'index.html'));
  });
}

app.listen(port, () => {
  console.log(`Server running on port ${port}`);
});