Adding log level

I think it's important to mention all the log levels. There are so many loggers that we might get confused (eg. TRACE vs FINEST, etc.)

docs/src/main/asciidoc/logging.adoc

@@ -54,6 +54,21 @@ The root logger category is handled separately, and is configured via the follow
 |quarkus.log.level|INFO|The default minimum log level for every log category.
 |===
 
+=== Log levels
+
+There are several log levels you can use:
+
+[cols="<m,<5",options="header"]
+|===
+|Level|Description
+|FATAL|For events that indicate a critical service failure
+|ERROR|To indicate a disruption in a request or the ability to service a request
+|WARN|May indicate a non-critical service error
+|INFO|For crucial related information
+|DEBUG|For messages that convey extra information
+|TRACE|Log low-level priority messages
+|===
+
 [id="format-string"]
 == Format String