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Remove integer port requirement for Facebook #435
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PaaS hosting offerings like Heroku and Azure App Service do not have a standard numerical port, as it's randomly generated when the app is re-started.
The code currently has a check that ensures the port specified is a number. This will always fail and throw an exception on Heroku and Azure App Service, causing the app the crash.
Example port from Azure App Service: ".\pipe\a59322f5-0005-4a3b-9242-24625191a3f2"
My fix removes the number check as ExpressJS, which is how the bots are served, has no requirement that ports are a number.
Closes #369