server.js

const path = require('path');
const express = require('express');
const cors = require('cors');
const mongoose = require('mongoose');
const session = require('express-session');
const MongoStore = require('connect-mongo')(session);
const cookieParser = require('cookie-parser');
const morgan = require('morgan');
const dotenv = require('dotenv');

dotenv.config({ path: path.resolve(__dirname, '.env') });

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

const { origin, mongodbURI, sessionSecret } = require('./configuration');

mongoose.Promise = global.Promise;
mongoose.connect(mongodbURI, { useNewUrlParser: true, useUnifiedTopology: true });
mongoose.connection.on('error', console.error.bind(console, 'Connection error:'));
mongoose.connection.once('open', () => console.log('Connected to database!'));

const app = express();

app.use(morgan('dev'));

app.use(
	cors({
		origin,
		credentials: true,
	})
);

app.use(cookieParser());
app.use(express.json());

app.use(
	session({
		secret: sessionSecret,
		store: new MongoStore({ mongooseConnection: mongoose.connection }),
		resave: false,
		saveUninitialized: false,
	})
);

app.use('/api', require('./routes'));

if (process.env.NODE_ENV === 'production') {
	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 started on port ${PORT}`);
});