add a diff

Signed-off-by: Fredrik Adelöw <freben@gmail.com>

.changeset/curly-fishes-speak.md

@@ -9,5 +9,23 @@ This resulted in 404 errors in newly bootstrapped backstage applications,
 when adding components without configuration.
 
 To fix this in an existing backstage application, the locationAnalyzer needs
-to be added to the `packages/backend/src/plugins/catalog.ts` file.
-Check out `/backstage/packages/create-app/templates/default-app/packages/backend/src/plugins/catalog.ts` for reference.
+to be carried from the builder to the router in the
+`packages/backend/src/plugins/catalog.ts` file.
+
+```diff
+   const builder = new CatalogBuilder(env);
+   const {
+     entitiesCatalog,
+     locationsCatalog,
+     higherOrderOperation,
++    locationAnalyzer,
+   } = await builder.build();
+   // ...
+   return await createRouter({
+     entitiesCatalog,
+     locationsCatalog,
+     higherOrderOperation,
++    locationAnalyzer,
+     logger: env.logger,
+   });
+```