Increased cache time

main.go

@@ -23,14 +23,17 @@ import (
 
 var content embed.FS
 
+var chrome *svg2png.Chrome
+
 func main() {
+	chrome = svg2png.NewChrome().SetHeight(600).SetWith(1200).SetTimeout(10 * time.Second)
+	ch := cache.New(24*time.Hour, 48*time.Hour)
+
 	app := fiber.New()
 	app.Use(compress.New())
 	app.Use(cors.New())
 	app.Use(logger.New())
 
-	ch := cache.New(6*time.Hour, 24*time.Hour)
-
 	app.Get("/", func(c *fiber.Ctx) error {
 		c.Type("html", "UTF8")
 		body, _ := content.ReadFile("index.html")
@@ -60,7 +63,7 @@ func main() {
 				fmt.Println(err)
 				return c.SendStatus(500)
 			}
-			ch.Set(key, png, 0)
+			ch.Set(key, png, cache.DefaultExpiration)
 		}
 
 		c.Type("png")
@@ -91,7 +94,6 @@ func generateImage(vars map[string]string) ([]byte, error) {
 
 	imageFile, err := os.CreateTemp(os.TempDir(), "img-*.png")
 
-	chrome := svg2png.NewChrome().SetHeight(600).SetWith(1200).SetTimeout(10 * time.Second)
 	if err := chrome.Screenshoot(fmt.Sprintf("file://%s", file.Name()), imageFile.Name()); err != nil {
 		return nil, err
 	}