Replace print statements with logger module

[kousthubraja]

Logging module has added advantage of streaming to files which we can monitor from an webapp or sort.

An example logger init is here

real_path = os.path.realpath(__file__)
dir_path = os.path.dirname(real_path)
LOGFILE = f"{dir_path}/test.log"
logger = logging.getLogger('log_app')
logger.setLevel(logging.DEBUG)
fh = logging.FileHandler(LOGFILE)
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
fh.setFormatter(formatter)
logger.addHandler(fh)

We want to stream logs to a file. The end goal is to be able to monitor the logs from a url on the node. Like here

[kousthubraja]

@Prannav-k also include an API to stream logs as mentioned in the doc. This can be included in app/routers/system.py