Code files

Chapter01/enabling-core-debug-logs/instrumented-app/index.js

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+const util = require('util')
+const express = require('express')
+const debug = util.debuglog('my-app')
+const app = express()
+
+app.get('/', (req, res) => {
+  debug('incoming request on /', req.route)
+  res.send('hey')
+})
+
+setTimeout(function myTimeout() { 
+   debug('timeout complete')
+   console.log('I waited for you.')
+}, 100)
+
+app.listen(3000)