doc(README): add logging property with pattern

Maximilien Marie · Maximilien Marie · commit 3b46d9af9cad · 2015-10-10T19:45:25.000+02:00
diff --git a/README.md b/README.md
@@ -29,6 +29,11 @@ server:
     - type: http
       port: 9091
 
+logging:
+  appenders:
+    - type: console
+      logFormat: "%-5p [%d{ISO8601,UTC}] [%thread] [%c{5}] [hookId:%X{hookId:--}] : %m%n%rEx"
+      
 password: test-password
 
 jira:
