Add static serving for /icons/* and manifest.json

src/server/index.ts

@@ -63,6 +63,8 @@ if (process.env.NODE_ENV === 'production') {
 }
 app.use('/favicon.png', serveStatic({ path: './public/favicon.png' }));
 app.use('/AGB.pdf', serveStatic({ path: './public/AGB.pdf' }));
+app.use('/icons/*', serveStatic({ root: './public' }));
+app.use('/manifest.json', serveStatic({ path: './public/manifest.json' }));
 
 app.route("/rpc", rpcApp);
 app.route("/caldav", caldavApp);