server.js

const express = require('express');
const app = express();
const path = require('path');
const cors = require('cors');
const bodyParser = require('body-parser');
const connectDB = require('./config/db');

//Connect to the database
connectDB();

// Built in Middleware to parse incoming requests with JSON payloads
app.use(express.json());

app.use('/api/users', require('./routes/api/users'));
app.use('/api/posts', require('./routes/api/posts'));
app.use('/api/auth', require('./routes/api/auth'));
app.use('/api/profile', require('./routes/api/profile'));

// Init cors middleware
app.use(cors());
app.use(bodyParser.urlencoded({ limit: '50mb', extended: true }));
app.use(bodyParser.json({ limit: '50mb', extended: true }));

app.use((req, res, next) => {
  res.header('Access-Control-Allow-Origin', '*');
  res.header(
    'Access-Control-Allow-Headers',
    'Origin, X-Requested-With, Content-Type, Accept'
  );
  next();
});

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

const PORT = process.env.PORT || 5000;

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