Urine output depends on fluid intake,and is adequate in your case. At this age,give 3 milk feeds including one top milk feed using a spoon and katori and rest breastfeeding and 3 solid meals a day including curd and Banana in the diet in addition to whatever you prepare at home. Give 5-6 spoons of water after every solid meal. No extra fluids are required unless there's loss of fluid due to loose motions,for example.