How to enable logging in flowable springboot application

Hi all,
I am new to flowable. I have developed the aplication using flowable-springboot. Its working alright and I am monioring the process via springboot console. Now, I want to store all the infor in logs for obvious reasons but I just can’t see to do it. I am referring both springboot anf flowable logging techniques I find online but nothing is helping. I’ve updated flowable-default.properies as follows.
logging.level.root = info info info
Then I created logger object in flowable springboot main class. Nothing happened.
I’ve tried adding slf4j-log4j12 ependency in maven. That fails with error and I can’t even start flowable.
What am I missing here. Is there an example documentation that I can follow?