added log config file description to logging docs

Logging.md

@@ -28,19 +28,25 @@ The log config can be set by `ACAPY_LOG_CONFIG`.
 Example:
 
 ```sh
-ACAPY_LOG_LEVEL=info ACAPY_LOG_FILE=./acapy.log ACAPY_LOG_CONFIG=./acapy_log.yml ./bin/aca-py start
+ACAPY_LOG_LEVEL=info ACAPY_LOG_FILE=./acapy.log ACAPY_LOG_CONFIG=./acapy_log.ini ./bin/aca-py start
 ```
 
 ## Acapy Config File
 
 Following parameters can be used in a configuration file like [this](demo/demo-args.yaml).
 
 ```yaml
-log-level: CRITICAL
+log-level: WARNING
 debug-connections: false
 debug-presentations: false
 ```
 
 Warning: debug-connections and debug-presentations must not be used in a production environment as they log also credential claims values.
 Both parameters are independent of the log level, which means:
 Also if log-level is set to WARNING, connections and presentations will be logged like in debug log level.
+
+## Log config file
+
+Find an example in [default_logging_config.ini](aries_cloudagent/config/default_logging_config.ini).
+
+You can find more detail description in the [logging documentation](https://docs.python.org/3/howto/logging.html#configuring-logging).