add MediaLofi in kontor-gin (#97)

Co-authored-by: Thomas Peetz <thomas.peetz@cimt-ag.de>
Reviewed-on: #97

kontor-gin/internal/models/media_file.go

@@ -26,6 +26,10 @@ func (media_file *MediaFile) TableName() string {
 	return "media_file"
 }
 
+type MediaFileAdd struct {
+	Url string `json:"url"`
+}
+
 type MediaFileDTO struct {
 	ID             string             `json:"id"                     binding:"required"`
 	CreatedAt      helpers.KontorTime `json:"created_date"`