refactor(common): use strings.ToLower for LOG_DOCKER env variable…

… check to improve code readability and maintainability (#1035)

Co-authored-by: luogz17 <luogz17@annto.com.cn>
Co-authored-by: HAOYUatHZ <37070449+HAOYUatHZ@users.noreply.github.com>

common/cmd/cmd.go

@@ -15,7 +15,7 @@ var verbose bool
 
 func init() {
 	v := os.Getenv("LOG_DOCKER")
-	if v == "true" || v == "TRUE" {
+	if strings.ToLower(v) == "true" {
 		verbose = true
 	}
 }