How to increase my supply? 🍼🍼

My baby is a month old and is ebf & doesn't drink from a bottle at all. I'm planning on going back to work soon so I've been pumping trying to store up for when she does need to take a bottle. However, I feel like I don't produce enough to breastfeed her through out the day and pump at the same time. If I pump before I feed her she always wants more and never gets full but if I pump after I feed her I only get an ounce all together from both if I'm lucky. What are tips on increasing my supply? 😊