WIP: updated log level on some log entries and added environment variable expansion for command line and its arguments

logger/logger.go

@@ -7,13 +7,15 @@ type Content interface {
 	Err(error) Content
 }
 
-type Level interface {
+type LogLevel interface {
 	Info() Content
 	Warn() Content
 	Error() Content
 	Fatal() Content
+	Debug() Content
+	Trace() Content
 }
 
 type Log interface {
-	Level
+	LogLevel
 }