fix: Docker build error: The local project doesn't define a 'packageManager' field

package.json

@@ -2,6 +2,7 @@
   "name": "blog-astro",
   "type": "module",
   "version": "0.0.2",
+  "packageManager": "pnpm@9.7.1",
   "scripts": {
     "dev": "astro dev",
     "start": "astro dev",
@@ -19,4 +20,4 @@
   "devDependencies": {
     "unocss": "^0.64.1"
   }
-}
+}