Added minikube log level

Author: LeoHeo

minkube-log-level.md

@@ -0,0 +1,15 @@
+## Minikube log level
+
+### 레벨에 따른 설명
+```
+--v=0 INFO level logs
+--v=1 WARNING level logs
+--v=2 ERROR level logs
+--v=3 libmachine logging
+--v=7 libmachine --debug level logging
+```
+
+### 사용방법
+```
+$ minikube -v7 start
+```