working settings update.

Settings are loaded from the DB and added to the AppConfig during startup.
When updating settings, they are stored in AppConfig, and written do  the database.

webapp/backend/pkg/web/handler/get_settings.go

@@ -11,7 +11,7 @@ func GetSettings(c *gin.Context) {
 	logger := c.MustGet("LOGGER").(logrus.FieldLogger)
 	deviceRepo := c.MustGet("DEVICE_REPOSITORY").(database.DeviceRepo)
 
-	settings, err := deviceRepo.GetSettings(c)
+	settings, err := deviceRepo.LoadSettings(c)
 	if err != nil {
 		logger.Errorln("An error occurred while retrieving settings", err)
 		c.JSON(http.StatusInternalServerError, gin.H{"success": false})