add alias in repo setting

routers/repo/setting.go

@@ -98,6 +98,7 @@ func SettingsPost(ctx *context.Context, form auth.RepoSettingForm) {
 		repo.Description = form.Description
 		repo.Website = form.Website
 		repo.IsTemplate = form.Template
+		repo.Alias = form.Alias
 
 		// Visibility of forked repository is forced sync with base repository.
 		if repo.IsFork {