add browser open function

main.go

@@ -7,6 +7,8 @@ import (
 	"os"
 	"slideshowApp/env"
 	"slideshowApp/handlers"
+	"slideshowApp/utils"
+	"time"
 
 	"github.com/gorilla/mux"
 )
@@ -23,11 +25,14 @@ func main() {
 
 	if _, err := os.Stat(uploadFolder); err != nil {
 		fmt.Println("upload folder for images not found: ", uploadFolder)
-		fmt.Println("use fallback")
+		fmt.Println("use fallback folder")
 		uploadFolder = "./images"
+		env.PhotoDir.SetValue(uploadFolder)
+
 	}
 
 	fmt.Println("upload folder for images: ", uploadFolder)
+
 	r.PathPrefix("/uploads/").Handler(http.StripPrefix("/uploads/", http.FileServer(http.Dir(uploadFolder))))
 	r.HandleFunc("/api/images", handlers.ListFilesHandler).Methods("GET")
 	r.HandleFunc("/ws", handlers.Websocket)
@@ -54,6 +59,12 @@ func main() {
 	host := env.Host.GetValue()
 	port := env.Port.GetValue()
 	url := fmt.Sprintf("%s:%s", host, port)
+	go func() {
+		time.Sleep(3 * time.Second)
+		if err := utils.OpenBrowser(fmt.Sprintf("%s:%s/slideshow", handlers.GetLocalIP(), port)); err != nil {
+			fmt.Println(err)
+		}
+	}()
 	fmt.Println("Server running at", url)
 	log.Fatal(http.ListenAndServe(url, r))
 }