refactor: Update Taskfile.yml to use lowercase variable names for consistency

cmd/main/main.go

@@ -5,21 +5,50 @@ import (
 	"caatsm/internal/handlers"
 	"caatsm/internal/nats"
 	"caatsm/pkg/utils"
+	"os"
 
 	"fmt"
+
+	"github.com/urfave/cli/v2"
 )
 
 func main() {
+	app := setupApp()
+	if err := app.Run(os.Args); err != nil {
+		fmt.Printf("Error running application: %v\n", err)
+	}
+}
+
+func setupApp() *cli.App {
+	app := &cli.App{
+		Name:  "serial-read",
+		Usage: "A serial port reading CLI application",
+		Before: func(c *cli.Context) error {
+			// parameter = config.GetParameter()
+			return nil
+		},
+		Commands: []*cli.Command{
+			{
+				Name:   "listen",
+				Usage:  "Listen to nats messages",
+				Action: executeListen,
+			},
+		},
+	}
+	return app
+}
+
+func executeListen(c *cli.Context) error {
 	cfg, err := config.LoadConfig()
 	log := utils.GetLogger()
 	if err != nil {
 		fmt.Printf("Error loading configuration: %v\n", err)
-		return
+		return err
 	}
 
 	if err := config.ValidateConfig(cfg); err != nil {
 		fmt.Printf("Invalid configuration: %v\n", err)
-		return
+		return err
 	}
 
 	fmt.Println("Loaded configuration successfully")
@@ -28,4 +57,5 @@ func main() {
 	handler := handlers.NewNatsHandler(cfg)
 
 	nats.Subscribe(cfg, &handlers.PlainTextMarshaler{}, handler)
+	return nil
 }