feat(templates): Get static mounted images

services/templater.go

@@ -81,7 +81,11 @@ func (t *DefaultTemplater) GenerateBarcode(code string, format string, prefix st
 }
 
 func (t *DefaultTemplater) SelectSponsorImage(id int) (string, error) {
-	return templates.GetImage("error"), nil
+	sponsors := []string{
+		"sponsoringheader",
+		"odit",
+	}
+	return templates.GetImage(sponsors[id%len(sponsors)]), nil
 }
 
 func (t *DefaultTemplater) StringToTemplate(templateString string) (*template.Template, error) {