사이버기념관 (nmkpg_cyber)

1.POST /api/question
  1) request
     a) user_id: not required

2.GET /api/question_list
  1) request
     a) user_id: not required
       - if user_id param is not empty, return data of the user_id
         if user_id param is empty, return all data
   2) response
     remove user_id field except data.user_id