text: const express = require('express');
  const app = express();
  app.use(express.json());
  
  const authors = [
      { id: 1, name: 'Mark Wilkins', book: "Learning Amazon Web Services (AWS)"},
      { id: 2, name: 'Steve Morad', book: "AWS Certified Advanced Networking"},
      { id: 3, name: 'Gojko Adzic', book: "Running Serverless"},
      { id: 4, name: 'Giuseppe Borgese', book: "Effective DevOps with AWS"},
      { id: 5, name: 'Vikas Aggarwal', book: "Ansible 2 Cloud Automation Cookbook"},
      { id: 6, name: 'Ajit Pratap Kundan', book: "VMware Cross-Cloud Architecture"},
  ]
  
  //READ Request Handlers
  
  app.get('/', (req, res) => {
      console.log('=== GET request  at / ===');
      res.sendFile('./healthcheck.html', { root: __dirname });
  });
  
  app.get('/api/authors/health', (req, res) => {
      console.log('=== GET request  at /api/authors/healthcheck ===');
      res.sendFile('./healthcheck.html', { root: __dirname });
  });
  
  app.get('/api/authors', (req, res) => {
      console.log('=== GET request  at /api/authors ===');
      res.send(authors);
  });
  
  app.get('/api/authors/:id', (req, res) => {
      const author = authors.find(c => c.id === parseInt(req.params.id));
      console.log('=== GET request  at /api/authors/{id} ===');
      if (!author) res.status(404).send('<h2 style="font-family: Malgun Gothic; color: darkred;">Ooops... Cant find what you are looking for!</h2>');
      res.send(author);
  });
  
  
  //PORT ENVIRONMENT VARIABLE
  // const port = process.env.PORT || 80;
  const port = 80;
  app.listen(port, '0.0.0.0', () => console.log(`Listening on port ${port}..`));