Food is a very important thing in life it is what gives us strength to thrive in life.You need to think from two perspectives one short term and two long term.
Short term food needs
Dry goods like beans crackers rice powdered eggs flour sugar.
canned goods like meats vegetables fruits
no frozen or refrigerated items unless you have backup power like solar to run them
Long term food needs
You should have a good supply of Heirloom Seeds as they can replace your seeds from what you grow and that is important.