server.js

const express = require('express');
const mongoose = require('mongoose');
const bodyParser = require('body-parser');
const users = require('./routes/api/users');
const profile = require('./routes/api/profile');
const posts = require('./routes/api/posts');
const passport = require('passport');
const path = require('path');

const app = express();

//Body parser middleware
app.use(bodyParser.urlencoded({extended: false}));
app.use(bodyParser.json());

// DB Config 
const db = require('./config/keys').mongoURI;

// Connect to MongoDB
mongoose
    .connect(db)
    .then(() => console.log('MongoDB connected'))
    .catch(er => console.log(err));

// Passport Middleware
app.use(passport.initialize());

// Passport Config
require('./config/passport')(passport);

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

// Server static assetsif in production
if(process.env.NODE_ENV !== 'production'){
    // Set a satic folder
    app.use(express.static(path.join(__dirname, 'client/build')));

    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}`);
});