Add loglevel as a command line argument for witness (WebOfTrust#688)

* Enable INFO level logging for keripy witnesses

keripy INFO level logs cover most of the cases.

hio.help.ogling module provides Ogler class for global logging in keripy. The class can print log to

- console
- syslog
- file

* Make log level configurable from command line argument

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Co-authored-by: Rubel Hassan Mollik <[email protected]>
Co-authored-by: Daniel Hardman <[email protected]>

src/keri/app/cli/commands/witness/start.py

@@ -47,11 +47,12 @@
 parser.add_argument("--keypath", action="store", required=False, default=None)
 parser.add_argument("--certpath", action="store", required=False, default=None)
 parser.add_argument("--cafilepath", action="store", required=False, default=None)
+parser.add_argument("--loglevel", action="store", required=False, default="CRITICAL", help="Set log level to DEBUG | INFO | WARNING | ERROR | CRITICAL. Default is CRITICAL")
 
 
 def launch(args):
-    help.ogler.level = logging.CRITICAL
-    help.ogler.reopen(name=args.name, temp=True, clear=True)
+    help.ogler.level = logging.getLevelName(args.loglevel)
+    help.ogler.reopen(name=args.name, temp=True, clear=True)  # need to configure for logging persistent file
 
     logger = help.ogler.getLogger()