app.js

const express = require('express');
const app = express();
const tasks = require('./routes/tasks');
const connectDB = require('./db/connect');
require('dotenv').config();
const notFound = require('./middleware/not-found');

// middleware
app.use(express.static('./public'));
app.use(express.json());

// routes
app.use('/api/v1/tasks', tasks);

app.use(notFound);

const port = process.env.PORT || 3000;

const start = async () => {
  try {
    await connectDB(process.env.MONGO_URI); // invoking 'connectDB()' with a param that accesses .env-content with 'process.env.'
    app.listen(port, console.log(`Server is listening on port ${port}`));
  } catch (error) {
    console.log(error);
  }
};

start();
// console.log('some text');