fix(cmd): use pointer instead a copied object of the configFile environment

cmd/temperature/list.go

@@ -21,7 +21,7 @@ var listTemperatureCmd = &cobra.Command{
 	Run: func(cmd *cobra.Command, args []string) {
 
 		// read configuration
-		cnf, err := config.Read(configFile)
+		cnf, err := config.Read(*configFile)
 		if err != nil {
 			log.Fatalln(err)
 		}