Fix the regression in the support of external schemas in the router

Signed-off-by: David Festal <dfestal@redhat.com>

plugins/app-backend/src/service/router.ts

@@ -113,6 +113,7 @@ export async function createRouter(
     staticFallbackHandler,
     auth,
     httpAuth,
+    schema,
   } = options;
 
   const disableConfigInjection =
@@ -143,6 +144,7 @@ export async function createRouter(
         config,
         appDistDir,
         env: process.env,
+        schema,
       });
 
   const assetStore =