That endgame is winning for white, all white has to do is get rid of the pawns a4,b3 and try to preserve at least one pawn on the kingside and make it a passed pawn, the knight plays an important role by cutting all black ideas of promoting any pawns


1. Kd5 2. Kb4 Ke5 3. Kxa4 Kf5 4. Kxb3 Kxg5 5. Nd2 f5 6. f3 exf3 7. Nxf3+ Kh5
8. Kc4 g5 9. Kd5 g4 10. hxg4+ fxg4 11. Ng1 Kg6 12. e4 Kf7 13. e5 Ke7 14. Ne2 h5
15. Ng3 Kf7 16. Nxh5 Kg6 17. Ng3 Kg5 18. e6 *

You should aim for somehting like this