Milk is the food designed for Mother Nature for newborns. Breastfeeding is the recommended option from 0 to 4 months and many mothers find it the most convenient, as well. Breast milk contains all nutrients a baby need, always ready, it comes in an aseptic container and it is always at the right temperature.
If breastfeeding is not possible, do not worry. Available baby formulas are as close to breast milk as science can reach.