feat(barcode): Baseline for barcode caching

main.go

@@ -12,6 +12,7 @@ import (
 	"github.com/gofiber/fiber/v2"
 	"github.com/gofiber/fiber/v2/middleware/keyauth"
 	"github.com/gofiber/swagger"
+	"github.com/redis/go-redis/v9"
 	"github.com/spf13/viper"
 )
 
@@ -73,7 +74,17 @@ func main() {
 		log.Fatal(err)
 	}
 
-	barcodeGenerator := &services.DefaultBarcodeService{}
+	var redisClient *redis.Client
+	if config.RedisAddr != "" {
+		log.Println("Using redis at", config.RedisAddr)
+		redisClient = redis.NewClient(&redis.Options{
+			Addr: config.RedisAddr,
+		})
+	}
+
+	barcodeGenerator := &services.DefaultBarcodeService{
+		RedisClient: redisClient,
+	}
 	staticService := &services.DefaultStaticService{
 		Cache: make(map[string]string),
 	}