fix: dont send enoent for routes under the excluded path

lib/loaders/express.loader.ts

@@ -70,12 +70,19 @@ export class ExpressLoader extends AbstractLoader {
         app.get(options.renderPath, renderFn);
       }
 
-      // eslint-disable-next-line @typescript-eslint/no-unused-vars
-      app.use((err: any, _req: any, _res: any, _next: Function) => {
+      app.use((err: any, req: any, _res: any, next: Function) => {
+        if (isRouteExcluded(req, options.exclude)) {
+          const method = httpAdapter.getRequestMethod(req);
+          const url = httpAdapter.getRequestUrl(req);
+          return next(new NotFoundException(`Cannot ${method} ${url}`));
+        }
+
         if (err instanceof HttpException) {
           throw err;
-        } else if (err?.message?.includes('ENOENT') || err?.code === 'ENOENT') {
+        } else if (err?.message?.includes('ENOENT')) {
           throw new NotFoundException(err.message);
+        } else if (err?.code === 'ENOENT') {
+          throw new NotFoundException(`ENOENT: ${err.message}`);
         }
       });
     });

tests/e2e/express-adapter.e2e-spec.ts

@@ -119,7 +119,18 @@ describe('Express adapter', () => {
         return request(server)
           .get('/404')
           .expect(404)
-          .expect(/Not Found/);
+          .expect(/Not Found/)
+          .expect(/ENOENT/);
+      });
+    });
+
+    describe('when trying to hit a non-existing route under the excluded path', () => {
+      it('should return 404', async () => {
+        return request(server)
+          .get('/api/404')
+          .expect(404)
+          .expect(/Not Found/)
+          .expect(/Cannot GET \/api\/404/);
       });
     });