Breastfeeding and Coffee

Hello Moms! I have a 10 month old baby girl that still breastfeeds more tgan she eats food. Ive tried to get her to eat food but she just isnt interested much yet. Anyways...I have avoided coffee and caffeine my entire pregnancy and the past 10 months since I have had her. But today I decided I need caffeine to function again. How much coffee is safe to drink while breastfeeding? And how much do you have to drink before it gets into the milk and the baby gets it? I drink folgers home brew coffee not any super strog espresso coffees.