docs: fix doc

Author: lihbr

docs/package.json

@@ -5,8 +5,7 @@
 		"build": "nuxt build",
 		"dev": "nuxt dev",
 		"generate": "nuxt generate",
-		"preview": "nuxt preview",
-		"postinstall": "nuxt prepare"
+		"preview": "nuxt preview"
 	},
 	"devDependencies": {
 		"@nuxt-themes/docus": "^1.15.0",