index.js

const express = require("express");
const mongoose = require("mongoose");
const bodyParser = require("body-parser");
const morgan = require("morgan");
const cors = require("cors");
const helmet = require("helmet");

//import config
const config = require("./config");

//import router
const Router = require("./router");

//create app using express
const app = express();

//Connect to the MongoDB
mongoose.connect(config.MONGO_URI, {
  user: config.MONGO_USER,
  pass: config.MONGO_PASS
})

//Secure Express Apps
app.use(helmet())

//CORS Options
const corsOptions = {
  origin: true,
  credentials: true
};

app.use(cors(corsOptions));

//Parse the body request to json
app.use(bodyParser.json());

//HTTP request logger with Morgan
app.use(morgan("dev"));

//Router
Router(app);

//Listen server to the specific PORT
app.listen(config.PORT, () => {
  console.log(`listen port ${config.PORT}`)
})