Background tasks in jester

[Hideki]

Hi Cnerd, Thank you for your comment. It worked with the code like this:
    
    
    get "/roll-a-dice":
        let random_number = rand(1..6)
        if result.headers.isNone():
          result.headers = some(RawHeaders(@[]))
        result.headers.get().add((key: "x-random", val: $random_number))
        resp $random_number
      
      after "/roll-a-dice":
        {.gcsafe.}:
          if result.headers.isSome():
            for header in result.headers.get():
              if header.key == "x-random":
                logger.log(lvlInfo, "The dice roll was " & $header.val)
    
    
    Run