Implement all suitable warp functions used for run an application

[jneira]

• runEnv :: Port -> Application -> IO ()

  "Run an 'Application' on the port present in the @PORT@
  environment variable. Uses the 'Port' given when the variable is unset.
  This calls 'runSettings' with 'defaultSettings'."

• runSettings :: Settings -> Application -> IO ()
  • This can be hard and maybe some options cant be ported to servlet container
  • And we have to duplicate warp settings
• withApplication*

  Runs the given 'Application' on a free port. Passes the port to the given
  operation and executes it, while the 'Application' is running. Shuts down the
  server before returning.

• testWithApplication*

  Same as 'withApplication' but with different exception handling: If the
  given 'Application' throws an exception, 'testWithApplication' will re-throw
  the exception to the calling thread, possibly interrupting the execution of
  the given operation.