app.js

// Require Installed Modules
const fs = require("fs"),
  path = require("path"),
  express = require("express"),
  bodyParser = require("body-parser"),
  cors = require("cors"),
  morgan = require("morgan"),
  dotenv = require("dotenv");

// Load custom env variables
dotenv.config();

// My Custom Modules
const routes = require("./routes/");

// App Setup
const app = express(),
  port = process.env.PORT || 8000;

// create a write stream (in append mode)
const accessLogStream = fs.createWriteStream(
  path.join(__dirname, "access.log"),
  { flags: "a" }
);

//Middlewares
app.use(cors());
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
app.use(
  morgan(
    (tokens, req, res) =>
      [
        tokens.method(req, res),
        tokens.url(req, res),
        tokens.status(req, res),
        Math.floor(tokens["response-time"](req, res)).toString().length === 1
          ? `0${Math.floor(tokens["response-time"](req, res))}ms`
          : `${Math.floor(tokens["response-time"](req, res))}ms`,
      ].join(" "),
    { stream: accessLogStream }
  )
);
app.use(routes); // Use defined Routes

// App listen and port config
app.listen(port, () => console.log(`app's server is live on port ${port}`));