Is your feature request related to a problem? Please describe.
I'm trying to build a bot on localhost but using an external client for integration tests. The APIs module is blocking requests because of "cors" settings.

Describe the solution you'd like
I'd like to have a configuration option such as

"settings": {
  "api-server": {
    "cors": [ "*", "*.localdev", "*.example.com" ],
    "port": 3000
  }
}

Then let the library api-server understand to inject cors plugin into Express. Throwing an exception if cors npm module is missing asking to install.

Describe alternatives you've considered
Feature is discussed into #580 #815 but faded away 😴

Anyone interested?