Missing documentation of port of customRoutes

[hidde-jan]

Description

The documentation for custom HTTP routes does not mention on which port the route will become available.

It will be on the installerOptions.port (which defaults to 3000), but it's easy to think it will be available on the port passed to app.start(), which is confusing.

What type of issue is this? (place an x in one of the [ ])

• [ ] bug
• [ ] enhancement (feature request)
• [ ] question
• [x] documentation related
• [ ] example code related
• [ ] testing related
• [ ] discussion

Requirements (place an x in each of the [ ])

• [x] I've read and understood the Contributing guidelines and have done my best effort to follow them.
• [x] I've read and agree to the Code of Conduct.
• [x] I've searched for any related issues and avoided creating a duplicate issue.

[hello-ashleyintech]

Hi, @hidde-jan! Thanks for writing in. 😄 I have created a pull request based on the feedback you provided. You can find it here!

[seratch]

Fixed by https://github.com/slackapi/bolt-js/pull/1601