fix(sim): allow jsdelivr connect and silence favicon 404

Backend/index.ts

@@ -35,6 +35,10 @@ app.get('/', (_req, res) => {
   res.send('API is running');
 });
 
+app.get('/favicon.ico', (_req, res) => {
+  res.status(204).end();
+});
+
 app.get('/openapi.json', (_req, res) => {
   res.json(openApiDocument);
 });
@@ -48,6 +52,7 @@ app.use(
     contentSecurityPolicy: {
       directives: {
         scriptSrc: ["'self'", 'https://cdn.jsdelivr.net'],
+        connectSrc: ["'self'", 'https://cdn.jsdelivr.net'],
       },
     },
   }),