server.js

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

const router = require('./router');

const app = express();
// connect database
connectDB();

app.use(cors('*'));

app.use(bodyParser.json()); // support json encoded bodies
app.use(bodyParser.urlencoded({ extended: true })); // support encoded bodies

// setting up the header config
app.use((req, res, next) => {
  res.setHeader(
    'Access-Control-Allow-Headers',
    'Origin, Content-Type, X-Requested-With, Accept'
  );
  res.setHeader(
    'Access-Control-Allow-Methods',
    'GET, POST, PATCH, PUT, DELETE'
  );

  next();
});

// Init Middleware
app.use(express.json({ extended: false }));

// routers
app.use(router);

app.use(express.static(path.join(__dirname, './client/build')));
app.get('*', (req, res) => {
  res.sendFile(path.join(__dirname, './client/build'));
});

// for error
app.use((error, req, res, next) => {
  if (res.headerSent) {
    return next(error);
  }

  res
    .status(error.code || 500)
    .json({ message: error.message || 'An unknown error occurred' });
});

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

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