further ensure writeBundle() execution order (#1051)

vike/node/plugin/plugins/buildConfig.ts

@@ -84,7 +84,10 @@ function buildConfig(): Plugin {
     buildStart() {
       assertNodeEnv()
     },
-    async writeBundle(options, bundle) {
+    writeBundle: {
+      order: 'post',
+      sequential: true,
+      async handler(options, bundle) {
       if (isSsrBuild) {
         // Ideally we'd move dist/_temp_manifest.json to dist/server/client-assets.json instead of dist/assets.json
         //  - But we can't because there is no guarentee whether dist/server/ is generated before or after dist/client/ (generating dist/server/ after dist/client/ erases dist/server/client-assets.json)
@@ -102,6 +105,7 @@ function buildConfig(): Plugin {
         await fs.rm(serverManifestFilePath)
         await set_constant_ASSETS_MAP(options, bundle)
       }
+      }
     }
   }
 }