The example gives port 3000 as an example for running it on your localhost. Otherwise you need super-user permissions to start a server on port 80. But on Heroku's Cedar stack, it will run on port 80.
The example gives port 3000 as an example for running it on your localhost. Otherwise you need super-user permissions to start a server on port 80. But on Heroku's Cedar stack, it will run on port 80.