title: How to show console.log() on Heroku?
body: <p>I've tried to debug my app by using console.log() inside Node.js.</p>
  
  <p>However, I can never see them in heroku log no matter how many lines they show.</p>
  
  <pre><code>$ heroku logs -n 200
  </code></pre>
  
  <p>This didn't work for me.</p>
  
  <p>Whenever I post something on Heroku server, the log only shows something like: </p>
  
  <pre><code>2018-09-10T02:14:12.731148+00:00 heroku[router]: at=info method=POST path="/users" host=obscure-journey-65698.herokuapp.com request_id=349a44e8-5fd7-46a2-aacb-75e51503109c fwd="73.67.204.217" dyno=web.1 connect=1ms service=355ms status=400 bytes=216 protocol=https
  </code></pre>
  
  <p>The console log never shows up! They do log the information I want when running npm start. </p>
  
  <p>Thanks for any help.</p>