fix(backend-defaults): fixes actions registry http middleware conflicts

Signed-off-by: Adam Letizia <LetiziaAdam@JohnDeere.com>

.changeset/major-actors-stand.md

@@ -0,0 +1,5 @@
+---
+'@backstage/backend-defaults': patch
+---
+
+DefaultActionsRegistryService: add json middleware to /.backstage/actions/ routes only

packages/backend-defaults/src/alpha/entrypoints/actionsRegistry/DefaultActionsRegistryService.ts

@@ -90,7 +90,7 @@ export class DefaultActionsRegistryService implements ActionsRegistryService {
 
   createRouter(): Router {
     const router = PromiseRouter();
-    router.use(json());
+    router.use('/.backstage/actions/', json());
 
     router.get('/.backstage/actions/v1/actions', async (req, res) => {
       const credentials = await this.httpAuth.credentials(req);