docs: add baseURL

Author: atinux

docs/nuxt.config.ts

@@ -1,6 +1,9 @@
 // https://nuxt.com/docs/api/configuration/nuxt-config
 export default defineNuxtConfig({
   extends: ['@nuxt/ui-pro'],
+  app: {
+    baseURL: '/docs/'
+  },
   modules: [
     '@nuxt/content',
     '@nuxt/ui',