add static site generation including robots.txt and sitemap.xml

frontend/src/api/loadCalendar.ts

@@ -18,6 +18,9 @@ import { Module } from "../model/module";
 import { Calendar } from "../model/calendar";
 
 export async function getCalender(token: string): Promise<Module[]> {
+  if (import.meta.env.SSR) {
+    return [];
+  }
   const request = new Request("/api/collections/feeds/records/" + token, {
     method: "GET",
   });