fix test and add bug

Author: Yuangwang

packages/@apphosting/adapter-nextjs/src/bin/build.spec.ts

@@ -65,7 +65,7 @@ metadata:
 outputFiles:
   serverApp:
     include:
-      - .next/standalone
+      - ${outputBundleOptions.outputDirectoryAppPath}
 `,
     };
     validateTestFiles(tmpDir, expectedFiles);

packages/@apphosting/adapter-nextjs/src/utils.ts

@@ -193,6 +193,7 @@ async function generateBundleYaml(
       frameworkVersion: nextVersion,
     },
   };
+  // TODO (b/432285470) See if there is a way to also delete files for apps using Nx monorepos
   if (!process.env.MONOREPO_COMMAND) {
     outputBundle.outputFiles = {
       serverApp: {