팀 소개 및 서비스 소개 https://github.com/projectlion-nft/abble-homework/blob/main/team-introduction.md 공통부문 Smart Contract (balanceOf) https://github.com/projectlion-nft/abble-homework/blob/main/balanceOf.sol 팀부문 Smart Contract https://github.com/projectlion-nft/abble-back/blob/main/tree.sol