Use error page template for errors

http/response/response.go

@@ -15,6 +15,7 @@ func Error(status int, format string, a ...any) rsvp.Response {
 	return rsvp.Response{
 		Body:         fmt.Sprintf(format, a...),
 		Status:       status,
+		TemplateName: "error_page.gotmpl",
 	}
 }
 

http/templates/error_page.gotmpl

@@ -26,7 +26,7 @@
       </div>
       <div class="container d-flex flex-grow-1 justify-content-center align-items-center flex-column">
         <div class="alert alert-danger" role="alert">
-          <p class="mb-0">{{.Message}}</p>
+          <p class="mb-0">{{.}}</p>
         </div>
       </div>
     </div>