Proper latching and breastfeeding itself increases production of the milk. If baby passes urine 6-8 times a day then he/she is having enough milk for feed. Other thn that u ensure your hydration plenty of fluid. Balanced diet including fruits, vegetables,whole grains, all should be consumed. Maintain a healthy lifestyle.
Next Steps
After all this if u think that baby is not getting enough milk thn u can use formula milk in proper dilution and proper hygiene 2-3 times a day with your breast milk.