🚀 update Dockerfile

packages/action/package.json

@@ -11,7 +11,7 @@
     "ts-node": "10.2.1"
   },
   "scripts": {
-    "build": "ncc build --external canvas --out dist ./index.ts ",
+    "build": "ncc build --external canvas --external gifsicle --out dist ./index.ts",
     "dev": "ts-node __tests__/dev.ts"
   }
 }