server.js

const express = require('express');
const connectDB = require('./config/db');
const path = require('path');
const PORT = process.env.PORT || 5000;
const app = express();
//Connect to DB
connectDB();
//Init middleware
app.use(express.json({ extended: false }));

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

//Serve static assets in production
if (process.env.NODE_ENV === 'production') {
    //Set the 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(`listening on port ${PORT}`);
});