server.js

const express = require("express");
const mongoose = require("mongoose");
const routes = require("./routes");
const bodyParser = require("body-parser");
const passport = require("passport");
require('dotenv').config()

const app = express();

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

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

// Connect to MongoDB
mongoose
    .connect(
        process.env.MONGODB_URI || db,
        { useNewUrlParser: true }
    )
    .then(() => console.log("MongoDB successfully connected"))
    .catch(err => console.log(err));

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

// Passport config
require("./config/passport")(passport);

if (process.env.NODE_ENV === "production") {
    app.use(express.static("client/build"));
}

// Routes
app.use(routes);

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

app.listen(port, () => console.log(`Server up and running on port ${port} !`));